Plate tectonics

From Wikipedia, the free encyclopedia

The tectonic plates of the world were mapped in the second half of the 20th century.

Remnants of the Farallon Plate, deep in Earth's mantle. It is thought that much of the plate initially went under North America (particularly the western United States and southwest Canada) at a very shallow angle, creating much of the mountainous terrain in the area (particularly the southern Rocky Mountains).

Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building")^[1] is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.

The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.^[2]

Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.^[3]

Tectonic plates are able to move because the Earth's lithosphere has a higher strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.

Louis Agassiz

From Wikipedia, the free encyclopedia

 

Louis Agassiz
Born	May 28, 1807 Haut-Vully, Switzerland
Died	December 14, 1873 (aged 66) Cambridge, Massachusetts, U.S.
Fields	Paleontology Glaciology Geology Natural History
Alma mater	University of Erlangen-Nuremberg
Doctoral advisor	Carl Friedrich Philipp von Martius
Other academic advisors	Ignaz Döllinger
Notable students	William Stimpson
Notable awards	Wollaston Medal (1836)
Spouse	Cecilie Braun Elizabeth Cabot Cary
Children	Alexander Emanuel Agassiz Ida Agassiz Pauline Agassiz
Signature

Louis Agassiz (/ˈæɡəsi/, in English), May 28, 1807 – December 14, 1873, was a Swiss-born and European-trained biologist and geologist recognized as an innovative and prodigious scholar of Earth's natural history, with later American writings that have received scrutiny because of particular racial themes. Agassiz grew up in Switzerland, and studied and received Doctor of Philosophy and medical degrees at Erlangen and Munich, respectively. After further studies with Cuvier and von Humboldt in Paris, Agassiz proceeded with research leading to his appointment as professor of natural history at University of Neuchâtel.

After visiting Harvard University mid-career, he emigrated to the U.S. in 1847 and became a professor of zoology and geology at Harvard, and to head its Lawrence Scientific School and found its Museum of Comparative Zoology. Agassiz made extensive contributions to ichthyological classification (including of extinct species) and to the study of geological history (including to the founding of glaciology), and has become broadly known through student descriptions a thorough regimen of observational data gathering and analysis. The impressiveness of his vast institutional and scientific contributions to zoology, geology, and related areas—including many multivolume research series running to thousands of pages—has been somewhat tarnished by the evidence of his resistance to theories of Darwinian evolution, and his extensive later writings on polygenism.

Early life

Louis Agassiz was born in Môtier (now part of Haut-Vully) in the canton of Fribourg, Switzerland. Educated first at home, then spending four years of secondary school in Bienne, he completed his elementary studies in Lausanne. Having adopted medicine as his profession, he studied successively at the universities of Zürich, Heidelberg and Munich; while there he extended his knowledge of natural history, especially of botany. In 1829 he received the degree of Doctor of Philosophy at Erlangen, and in 1830 that of doctor of medicine at Munich. Moving to Paris he fell under the tutelage of Alexander von Humboldt and Georges Cuvier, who launched him on his careers of geology and zoology respectively. Previously he had not paid special attention to the study of ichthyology, but it soon became the focus of his life's work.

Work

Agassiz in 1870

In 1819–1820, Johann Baptist von Spix and Carl Friedrich Philipp von Martius were engaged in an expedition to Brazil, and on their return to Europe, amongst other collections of natural objects they brought home an important set of the fresh water fish of Brazil, and especially of the Amazon River. Spix, who died in 1826, did not live long enough to work out the history of these fish, and Agassiz (though fresh out of school) was selected by Martius for this purpose. He at once threw himself into the work with an enthusiasm which characterized him to the end of his busy life. The task of describing the Brazilian fish was completed and published in 1829. This was followed by research into the history of the fish found in Lake Neuchâtel. Enlarging his plans, in 1830 he issued a prospectus of a History of the Freshwater Fish of Central Europe. It was only in 1839, however, that the first part of this publication appeared, and it was completed in 1842.

In 1832 he was appointed professor of natural history in the University of Neuchâtel. The fossil fish there soon attracted his attention. The fossil-rich stones furnished by the slates of Glarus and the limestones of Monte Bolca were known at the time, but very little had been accomplished in the way of scientific study of them. Agassiz, as early as 1829, planned the publication of the work which, more than any other, laid the foundation of his worldwide fame. Five volumes of his Recherches sur les poissons fossiles ("Research on Fossil Fish") appeared at intervals from 1833 to 1843. They were magnificently illustrated, chiefly by Joseph Dinkel. In gathering materials for this work Agassiz visited the principal museums in Europe, and meeting Cuvier in Paris, he received much encouragement and assistance from him. They had known him for seven years at the time.

Agassiz found that his palaeontological labors made necessary a new basis of ichthyological classification. The fossils rarely exhibited any traces of the soft tissues of fish. They consisted chiefly of the teeth, scales and fins, even the bones being perfectly preserved in comparatively few instances. He therefore adopted a classification which divided fish into four groups: Ganoids, Placoids, Cycloids and Ctenoids, based on the nature of the scales and other dermal appendages. While Agassiz did much to place the subject on a scientific basis, this classification has been superseded by later work.

As Agassiz's descriptive work proceeded, it became obvious that it would over-tax his resources unless financial assistance could be found. The British Association came to his aid, and the Earl of Ellesmere—then Lord Francis Egerton—gave him yet more efficient help. The 1,290 original drawings made for the work were purchased by the Earl, and presented by him to the Geological Society of London. In 1836 the Wollaston Medal was awarded to Agassiz by the council of that society for his work on fossil ichthyology; and in 1838 he was elected a foreign member of the Royal Society. Meanwhile invertebrate animals engaged his attention. In 1837 he issued the "Prodrome" of a monograph on the recent and fossil Echinodermata, the first part of which appeared in 1838; in 1839–40 he published two quarto volumes on the fossil Echinoderms of Switzerland; and in 1840–45 he issued his Etudes critiques sur les mollusques fossiles ("Critical Studies on Fossil Mollusks").

Before his first visit to England in 1834, the labours of Hugh Miller and other geologists brought to light the remarkable fish of the Old Red Sandstone of the northeast of Scotland. The strange forms of the Pterichthys, the Coccosteus and other genera were then made known to geologists for the first time. They were of intense interest to Agassiz, and formed the subject of a special monograph by him published in 1844–45: Monographie des poissons fossiles du Vieux Gres Rouge, ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie ("Monograph on Fossil Fish of the Old Red Sandstone, or Devonian System of the British Isles and of Russia"). In the early stages of his career in Neuchatel, Agassiz also made a name for himself as a man who could run a scientific department well. Under his care, the University of Neuchâtel soon became a leading institution for scientific inquiry.

Louis Agassiz

He was the only person to name a species after Mary Anning during her lifetime. She was a paleontologist who was known around the world for important finds, but because of her gender, usually omitted from formal recognition for her work. In the early 1840s he named two fossil fish species after her—Acrodus anningiae, and Belenostomus anningiae—and another after her friend, Elizabeth Philpot. Agassiz was grateful for the help the women had given him in examining fossil fish specimens during his visit to Lyme Regis in 1834.^[1]

Ice age

 In 1837 Agassiz was the first to scientifically propose that the Earth had been subject to a past ice age.^[2] In the same year, he was elected a foreign member of the Royal Swedish Academy of Sciences. Prior to this proposal, Goethe, de Saussure, Venetz, Jean de Charpentier, Karl Friedrich Schimper and others had made the glaciers of the Alps the subjects of special study, and Goethe,^[3] Charpentier as well as Schimper^[2] had even arrived at the conclusion that the erratic blocks of alpine rocks scattered over the slopes and summits of the Jura Mountains had been moved there by glaciers. The question having attracted the attention of Agassiz, he not only discussed it with Charpentier and Schimper and made successive journeys to the alpine regions in company with them, but he had a hut constructed upon one of the Aar Glaciers, which for a time he made his home, in order to investigate the structure and movements of the ice.

These labours resulted, in 1840, in the publication of his work in two volumes entitled Etudes sur les glaciers ("Studies on Glaciers").^[4] In it he discussed the movements of the glaciers, their moraines, their influence in grooving and rounding the rocks over which they travelled, and in producing the striations and roches moutonnees seen in Alpine-style landscapes. He not only accepted Charpentier's and Schimper's idea that some of the alpine glaciers had extended across the wide plains and valleys drained by the Aar and the Rhône, but he went still farther. He concluded that, in the relatively recent past, Switzerland had been another Greenland; that instead of a few glaciers stretching across the areas referred to, one vast sheet of ice, originating in the higher Alps, had extended over the entire valley of northwestern Switzerland until it reached the southern slopes of the Jura, which, though they checked and deflected its further extension, did not prevent the ice from reaching in many places the summit of the range. The publication of this work gave a fresh impetus to the study of glacial phenomena in all parts of the world.

Thus familiarized with the phenomena associated with the movements of recent glaciers, Agassiz was prepared for a discovery which he made in 1840, in conjunction with William Buckland. The two visited the mountains of Scotland together, and found in different locations clear evidence of ancient glacial action. The discovery was announced to the Geological Society of London in successive communications. The mountainous districts of England, Wales, and Ireland were also considered to constitute centres for the dispersion of glacial debris; and Agassiz remarked "that great sheets of ice, resembling those now existing in Greenland, once covered all the countries in which unstratified gravel (boulder drift) is found; that this gravel was in general produced by the trituration of the sheets of ice upon the subjacent surface, etc."

The man-sized iron auger used by Agassiz to drill up to 7.5 metres deep into the Unteraar Glacier to take its temperature.

United States

In 1842–1846 he issued his Nomenclator Zoologicus, a classified list, with references, of all names employed in zoology for genera and groups — a work of great labour and research. With the aid of a grant of money from the King of Prussia, Agassiz crossed the Atlantic in the autumn of 1846 with the twin purposes of investigating the natural history and geology of North America and delivering a course of 12 lectures on “The Plan of Creation as shown in the Animal Kingdom,”^[5] by invitation from J. A. Lowell, at the Lowell Institute in Boston, Massachusetts. The financial offers presented to him in the United States induced him to settle there, where he remained to the end of his life. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1846.^[6]
His engagement for the Lowell Institute lectures precipitated the establishment of the Lawrence Scientific School at Harvard University in 1847 with him as its head.^[7] Harvard appointed him professor of zoology and geology, and he founded the Museum of Comparative Zoology there in 1859 serving as the museum's first director until his death in 1873. During his tenure at Harvard, he was, among many other things, an early student of the effect of the last Ice Age on North America.

He continued his lectures for the Lowell Institute. In succeeding years, he gave series of lectures on “Ichthyology” (1847–48 season), "Comparative Embryology" (1848–49), "Functions of Life in Lower Animals" (1850–51), "Natural History" (1853–54), "Methods of Study in Natural History" (1861–62), "Glaciers and the Ice Period" (1864–65), "Brazil" (1866–67) and "Deep Sea Dredging" (1869–70).^[8] In 1850 he married an American college teacher, Elizabeth Cabot Cary, who later wrote introductory books about natural history and, after his death, a lengthy biography of her husband.

Agassiz served as a non-resident lecturer at Cornell University while also being on faculty at Harvard.^[9] In 1852 he accepted a medical professorship of comparative anatomy at Charlestown, Massachusetts, but he resigned in two years. From this time his scientific studies dropped off, but he was a profound influence on the American branches of his two fields, teaching decades worth of future prominent scientists, including Alpheus Hyatt, David Starr Jordan, Joel Asaph Allen, Joseph Le Conte, Ernest Ingersoll, William James, Nathaniel Shaler, Samuel Hubbard Scudder, Alpheus Packard, and his son Alexander Emanuel Agassiz, among others. He had a profound impact on paleontologist Charles Doolittle Walcott and natural scientist Edward S. Morse. In return his name appears attached to several species, as well as here and there throughout the American landscape, notably Lake Agassiz, the Pleistocene precursor to Lake Winnipeg and the Red River, and Mount Agassiz, a bastion of the Palisade Crest, the largest glaciated region of California's Sierra Nevada.

During this time he grew in fame even in the public consciousness, becoming one of the best-known scientists in the world. By 1857 he was so well-loved that his friend Henry Wadsworth Longfellow wrote "The fiftieth birthday of Agassiz" in his honor. His own writing continued with four (of a planned ten) volumes of Natural History of the United States which were published from 1857 to 1862. During this time he also published a catalog of papers in his field, Bibliographia Zoologiae et Geologiae, in four volumes between 1848 and 1854.

Stricken by ill health in the 1860s, he resolved to return to the field for relaxation and to resume his studies of Brazilian fish. In April 1865 he led a party to Brazil. Returning home in August 1866, an account of this expedition, entitled A Journey in Brazil, was published in 1868. In December 1871 he made a second eight month excursion, known as the Hassler expedition under the command of Commander Philip Carrigan Johnson (brother of Eastman Johnson), visiting South America on its southern Atlantic and Pacific seaboards. The ship explored the Magellan Strait, which drew the praise of Charles Darwin.

Elizabeth Aggasiz wrote, at the Strait: '.....the Hassler pursued her course, past a seemingly endless panorama of mountains and forests rising into the pale regions of snow and ice, where lay glaciers in which every rift and crevasse, as well as the many cascades flowing down to join the waters beneath, could be counted as she steamed by them.... These were weeks of exquisite delight to Agassiz. The vessel often skirted the shore so closely that its geology could be studied from the deck.'

Legacy

Louis Agassiz

From his first marriage to Cecilie Bruan, Agassiz had two daughters in addition to son Alexander.^[10] In 1863, Agassiz's daughter Ida married Henry Lee Higginson, later to be founder of the Boston Symphony Orchestra and benefactor to Harvard University and other schools. On November 30, 1860, Agassiz's daughter Pauline was married to Quincy Adams Shaw (1825–1908), a wealthy
Boston merchant and later benefactor to the Boston Museum of Fine Arts.^[11]

In the last years of his life, Agassiz worked to establish a permanent school where zoological science could be pursued amid the living subjects of its study. In 1873, a private philanthropist (John Anderson) gave Agassiz the island of Penikese, in Buzzards Bay, Massachusetts (south of New Bedford), and presented him with $50,000 to permanently endow it as a practical school of natural science, especially devoted to the study of marine zoology. The John Anderson school collapsed soon after Agassiz's death, but is considered a precursor of the Woods Hole Marine Biological Laboratory, which is nearby.

Within his lifetime, Agassiz had developed a reputation for a particularly demanding teaching style. He would allegedly "lock a student up in a room full of turtle-shells, or lobster-shells, or oyster-shells, without a book or a word to help him, and not let him out till he had discovered all the truths which the objects contained."^[12] Two of Agassiz's most prominent students detailed their personal experiences under his tutelage, Samuel Hubbard Scudder in a short magazine article for Every Saturday^[13] and Nathaniel Southgate Shaler in his Autobiography.^[14] These and other recollections were collected and published by Lane Cooper in 1917,^[15] which Ezra Pound was to draw on for his anecdote of Agassiz and the sunfish.^[16]

Agassiz is remembered today for his theories on ice ages, and for his resistance to Charles Darwin's theories on evolution, which he kept up his entire life. He died in Cambridge, Massachusetts in 1873 and was buried at Mount Auburn Cemetery, joined later by his wife. His monument is a boulder selected from the moraine of the glacier of the Aar near the site of the old Hôtel des Neuchâtelois, not far from the spot where his hut once stood; and the pine-trees that shelter his grave were sent from his old home in Switzerland.

The Cambridge elementary school north of Harvard University was named in his honor and the surrounding neighborhood became known as "Agassiz" as a result. The school's name was changed to the Maria L. Baldwin School on May 21, 2002, due to concerns about Agassiz's racism, and to honor Maria Louise Baldwin the African-American principal of the school who served from 1889 until 1922.^[17][18] The neighborhood, however, continues to be known as Agassiz.^[19]

Agassiz's Grave, Mt Auburn Cemetery, Cambridge, Massachusetts.

Front of the monument, a boulder selected from the moraine of the Aar Glaciers, near where Louis Agassiz once lived.

Side.

Side.

An ancient glacial lake that formed in the Great Lakes region of North America, Lake Agassiz, is named after him, as are Mount Agassiz in California's Palisades, Mount Agassiz, in the Uinta Mountains, Agassiz Peak in Arizona and in his native Switzerland, the Agassizhorn in the Bernese Alps. Agassiz Glacier and Agassiz Creek in Glacier National Park and Mount Agassiz in Bethlehem, New Hampshire in the White Mountains also bear his name. A crater on Mars and a promontorium on the Moon are also named in his honour. A headland situated in Palmer Land, Antarctica is named in his honor, Cape Agassiz. A main-belt asteroid named 2267 Agassiz is also named in association with Louis Agassiz. In addition, several animal species are so named, including Apistogramma agassizi Steindachner, 1875 (Agassiz's dwarf cichlid); Isocapnia agassizi Ricker, 1943 (a stonefly); Publius agassizi (Kaup), 1871 (a passalid beetle); Xylocrius agassizi (LeConte), 1861 (a longhorn beetle); Exoprosopa agassizi Loew, 1869 (a bee fly); and the most well-known, Gopherus agassizii Cooper, 1863 (the desert tortoise).

In 2005 the EGU Division on Cryospheric Sciences established the Louis Agassiz Medal, awarded to individuals in recognition of their outstanding scientific contribution to the study of the cryosphere on Earth or elsewhere in the solar system. He took part in a monthly gathering called the Saturday Club at the Parker House, a meeting of Boston writers and intellectuals. He was therefore mentioned in a stanza of the Oliver Wendell Holmes, Sr. poem, "At the Saturday Club," where the author dreams he sees some of his friends who are no longer:

There, at the table's further end I see
In his old place our Poet's vis-à-vis,
The great PROFESSOR, strong, broad-shouldered, square,
In life's rich noontide, joyous, debonair.
His social hour no leaden care alloys,
His laugh rings loud and mirthful as a boy's,--
That lusty laugh the Puritan forgot,--
What ear has heard it and remembers not?
How often, halting at some wide crevasse
Amid the windings of his Alpine pass,
High up the cliffs, the climbing mountaineer,
Listening the far-off avalanche to hear,
Silent, and leaning on his steel-shod staff,
Has heard that cheery voice, that ringing laugh,
From the rude cabin whose nomadic walls
Creep with the moving glacier as it crawls!

How does vast Nature lead her living train
In ordered sequence through that spacious brain,
As in the primal hour when Adam named
The new-born tribes that young creation claimed!--
How will her realm be darkened, losing thee,
Her darling, whom we call our AGASSIZ!

Polygenism 

After Agassiz came to the United States he became a prolific writer the area of polygenism, the idea that races came from separate origins (specifically separate creations), that they could be classified on the basis of specific climatic zones (as animals and plants could generally be), and that they were accordingly endowed with unequal attributes,^[20] ideas now included under the rubric of scientific racism.

According to Harvard and University of Colorado historians of science Nadine Weidman and John Jackson, Agassiz was never a supporter of slavery, and claimed his views on polygenism had nothing to do with politics.^[21] Agassiz was influenced by philosophical idealism and the scientific work of Georges Cuvier. According to Agassiz, genera and species were ideas in the mind of God; their existence in God’s mind prior to their physical creation meant that God could create humans as one species yet in several distinct and geographically separate acts of creation. Per Church historian Paul M. Blowers, Agassiz believed there is one species of humans but many different creations of races.^[22]

Agassiz was a creationist who believed nature had order because God has created it directly, and Agassiz viewed his career in science as a search for ideas in the mind of the creator expressed in creation. Agassiz denied that migration and adaptation could account for the geographical age or any of the past. Adaptation takes time; in an example, Agassiz questioned how plants or animals could migrate through regions they were not equipped to handle.^[22] According to Agassiz the conditions in which particular creatures live “are the conditions necessary to their maintenance, and what among organized beings is essential to their temporal existence must be at least one of the conditions under which they were created”.^[22]

After the 1906 San Francisco earth­quake toppled Agassiz's statue from the façade of Stanford's zoology building, Stanford President David Starr Jordan wrote that "Somebody—​Dr. Angell, perhaps—​remarked that 'Agassiz was great in the abstract but not in the concrete.'"^[23]

In his work he noted similarities of distribution of like species in different geological eras, a phenomenon clearly not the result of migration. Agassiz questioned how fish of the same species live in lakes well separated with no joining waterway, Agassiz concluded they were created at both locations. According to Agassiz the intelligent adaptation of creatures to their environments testified to an intelligent plan. According to historian Paul Blowers, the conclusions of his studies led him to believe that whichever region each animal was found in, was created there “animals are naturally autochthones wherever they are found”; after further research he later extended this idea to humans, which became to be known as his theory of polygenism.^[22]

According to Agassiz’s theory of polygenism animals, plants and humans were all created in “special provinces” each having distinct populations of species created in and for that province. Agassiz claimed plants, animals and humans did not originate in pairs but were created in large numbers. According to Agassiz, the different races were created in different provinces, each race was indigenous to the province it was created in, he cited evidence from Egyptian monuments to prove that fixity of racial types had existed for at least five millennia. According to Agassiz’s theory of polygenism all species are fixed, including all the races of humans and species do not evolve into other species.^[22] The provinces that the different races were created in included Western American Temperate (the indigenous peoples west of the Rockies), Eastern American Temperate (east of the Rockies), Tropical Asiatic (south of the Himalayas), Temperate Asiatic (east of the Urals and north of the Himalayas), South American Temperate (South America), New Holland (Australia), Arctic (Alaska and Arctic Canada). Cape of Good Hope (South Africa), and American Tropical (Central America and the West Indies).^{[citation needed]}

Agassiz like other polygenists believed the Book of Genesis recounted the origin of the white race only and that the animals and plants in the Bible refer only to those species proximate and familiar to Adam and Eve. Agassiz, Josiah Clark Nott, and other polygenists such as George Gliddon, believed that the original Hebrew form of the name Adam came from a Biblical Hebrew consonantal root referring to redness, so that the name can be interpreted to mean "to show red in the face" or "blusher"; since only light skinned people can blush, then the biblical Adam must be the Caucasian race.^[22] Agassiz believed that the writers of the Bible only knew of local events, for example Noah's flood was a local event only known to the regions that were populated by ancient Hebrews, Agassiz claimed the writers of the Bible did not know about any events other than what was going on in their own region and their intermediate neighbors.^[22]

Per Blowers, Agassiz also opposed monogenism and evolution, he claimed that the theory of evolution reduced the wisdom of God to an impersonal materialism.^{[citation needed]} Per Blowers, Agassiz held species, by their natures and geographical distribution, to be direct expressions of the intelligence and will of God, not the results of blind chance, and that believed evolution was an insult to the wisdom and will of God.^[22] Agassiz’s polygenism theory was accepted by a number of scientists.^[22] For example, Nathaniel Shaler studied under Agassiz at Harvard, and was also an adherent to polygenism.^[24]

In recent years, critics^[vague] have cited Agassiz's polygenic theories and argued that his views otherwise tarnish his scientific record, a particular emphasis since the appearance of essays by Stephen Jay Gould, a Harvard taxonomist, and Alexander Agassiz Professor of Zoology and Professor of Geology, and Curator of Invertebrate Paleontology at the institution's Museum of Comparative Zoology. Gould, writing on aspects of the history of polygenism, asserted that Agassiz's and, relatedly, Morton's observations sprang from racist biases, in Agassiz's case, from his initial revulsion on encountering African-Americans on moving to the United States.^[25] However, Gould's essays have received substantial recent criticism for its own limits or bias in research and analysis (e.g., in the Morton case),^[26] and other historians parse the historic matters and come to other than Gould's harsh conclusions. Blowers notes that though Agassiz was a proponent of polygenism, he rejected racism and supported the notion of a spiritualized human unity: Agassiz argued that human polygenism did not undermine the spiritual commonality of all people though each race was physically diverse, and that physical descent was irrelevant to the spiritual descent of humanity.^[22]
Fundamentally, he reports that Agassiz believed God had made all men equal:

Those intellectual and moral qualities which are so eminently developed in civilized society, but which equally exist in the natural dispositions of all human races, constituting the higher unity among men, making them all equal before God.^[22]

The accusation of racism has occasionally prompted the renaming of landmarks, schoolhouses, and other institutions which bear the name of Agassiz (which abound in Massachusetts).^{[citation needed]} Opinions on these events are often mixed, given his extensive scientific legacy in other areas.^[27] On September 9, 2007 the Swiss government acknowledged the "racist thinking" of Agassiz but declined to rename the Agassizhorn summit.^{[28][better source needed]}

Works

• "'Recherches sur les poissons fossiles (1833–1843)
• History of the Freshwater Fishes of Central Europe (1839–1842)
• Etudes sur les glaciers (1840)
• Etudes critiques sur les mollusques fossiles (1840–1845)
• Nomenclator Zoologicus (1842–1846)
• Monographie des poissons fossiles du Vieux Gres Rouge, ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie (1844–1845)
• Bibliographia Zoologiae et Geologiae (1848)
• (with AA Gould) Principles of Zoology for the use of Schools and Colleges (Boston, 1848)
• Lake Superior: Its Physical Character, Vegetation and Animals, compared with those of other and similar regions (Boston: Gould, Kendall and Lincoln, 1850)
• Contributions to the Natural History of the United States of America (Boston: Little, Brown, and Co., 1857–1862)
• Geological Sketches (Boston: Ticknor & Fields, 1866)
• A Journey in Brazil (1868)
• De l'espèce et de la classification en zoologie [Essay on classification] (Trans. Felix Vogeli. Paris: Bailière, 1869)
• Geological Sketches (Second Series) (Boston: J.R. Osgood, 1876)
• Essay on Classification, by Louis Agassiz (1962, Cambridge)

Louis Leakey

From Wikipedia, the free encyclopedia

 

Louis Leakey
Louis Leakey examining skulls from Olduvai Gorge
Born	7 August 1903 Kabete, British East Africa (modern-day Kenya)
Died	1 October 1972 (aged 69) London, United Kingdom
Citizenship	Kenyan, British
Nationality	British
Fields	Archaeology, Paleoanthropology, Paleontology
Known for	Pioneering the study of human evolution, human evolutionary development in Africa
Notable awards	Hubbard Medal (1962) Prestwich Medal (1969)
Spouse	Mary Leakey

Louis Seymour Bazett Leakey (7 August 1903 – 1 October 1972), also known as L.S.B. Leakey, was a British paleoanthropologist and archaeologist whose work was important in establishing human evolutionary development in Africa, particularly through his discoveries in the Olduvai Gorge. He also played a major role in creating organizations for future research in Africa and for protecting wildlife there. Having been a prime mover in establishing a tradition of palaeoanthropological inquiry, he was able to motivate the next generation to continue it, notably within his own family, many of whom also became prominent. Leakey participated in national events of British East Africa and Kenya during the 1950s.

In natural philosophy, he asserted Charles Darwin's theory of evolution unswervingly and set about to test Darwin's hypothesis that humans arose in Africa. Leakey was also a devout Christian.^[1]

Background

"When I think back ... of the serval cat and a baboon that I had as pets in my childhood days−and that eventually I had to house in large cages−it makes me sad. It makes me sadder still, however, and also very angry, when I think of the innumerable adult animals and birds deliberately caught and locked up for the so-called 'pleasure' and 'education' of thoughtless human beings. ... surely there are today so many first-class films ... that the cruelty of keeping wild creatures in zoos should no longer be tolerated."

From L.S.B. Leakey, By the Evidence, Chapter 4.

Louis' parents, Harry and Mary Bazett Leakey (called May by her friends), were British missionaries of the Christian faith in then British East Africa, now Kenya.^[2] Harry had taken a previously established post of the Church Mission Society among the Kikuyu at Kabete. The station was at that time a hut and two tents in the highlands north of Nairobi. Louis' earliest home had an earthen floor, a leaky thatched roof, rodents and insects, and no heating system except for charcoal braziers. The facilities slowly improved over time. The mission, a center of activity, set up a clinic in one of the tents, and later a girl's school for African women. Harry was working on a translation of the Bible into a Kenyan language, Kikuyu.

Louis had a younger brother, Douglas, and two older sisters, Gladys Leakey Beecher and Julia Leakey Barham. Louis' primary family came to contain also Miss Oakes (a governess), Miss Higgenbotham (another missionary), and Mariamu (a Kikuyu nurse). Unsurprisingly, Louis grew up, played, and learned to hunt with Africans. He also learned to walk with the distinctive gait of the Kikuyu and speak their language fluently, as did his siblings. He was initiated into the Kikuyu ethnic group, an event of which he never spoke, as he was sworn to secrecy.^[3]

Louis requested and was given permission to build and move into a hut, Kikuyu style, at the end of the garden. It was home to his personal collection of natural objects, such as birds' eggs and skulls. All the children developed a keen interest in and appreciation of the pristine natural surroundings in which they found themselves. They raised baby animals, later turning them over to zoos. Louis read a gift book, Days Before History, by H. R. Hall (1907), a juvenile fictional work illustrating the prehistory of Britain. He began to collect tools and was further encouraged in this activity by a role model, Arthur Loveridge, first curator (1914) of the Natural History Museum in Nairobi, predecessor of the Coryndon Museum. This interest may have predisposed him toward a career in archaeology.^[4]

Neither Harry nor May were of strong constitution. From 1904-1906 the entire family lived at May's mother's house in Reading, Berkshire, England, while Harry recovered from neurasthenia, and again in 1911-1913, while May recovered from general frailty and exhaustion. During the latter stay, Harry bought a house in Boscombe.^[5]

The formative years

His father's example

In Britain, the Leakey children attended elementary school; in Africa, they had a tutor, Miss Laing. They sat out World War I in Africa. When the sea lanes opened again, they returned to Boscombe, where Louis was sent to Weymouth College, a private boy's school in 1919 at age 16. In three years there, he did not do well and complained of rules that he considered an infringement on his freedom and hazing by the other boys. Advised by one teacher to seek employment in a bank, he appealed to his English teacher, Mr. Tunstall, who started him in the application process to Cambridge. His excellent scores on the entrance exams won him a scholarship. He didnt finish college until 7 years later!

Louis matriculated to the University of Cambridge, his father's alma mater, in 1922, intent on becoming a missionary to British East Africa.

For the rest of his life, he would dine out on the story of his finals. When he had arrived in Britain, he had notified the register of people with a knowledge of rare languages that he was fluent in Swahili. When he came to his finals, he asked to be examined in this and after some hesitation the authorities agreed. Then one day, he received two letters. One instructed him to report at a certain time and place for a viva voce examination in Swahili. The other asked if, at the same time and place, he would examine a candidate in Swahili.

His son says:^[6]

"Louis was in his early twenties when he decided to pursue a fossil-hunting career. Until then, he had intended to follow his father's example and be a Christian missionary in Kenya."

He preached Christian zeal to his fellow students and otherwise impressed Cambridge society with behavior that was considered eccentric.^[7] He was also an evolutionist and befriended some future naturalists.^[8] In 1923, his usual zeal led him into a severe concussion in a game of Rugby union. He was relieved of his academic duties; rest and the outdoors were prescribed.

Diversion from missionary work

In that year a position became available that pushed all thought of rest into the background. In 1922 the British had been awarded German East Africa as part of the settlement of World War I, subsequently applying the name Tanganyika. Within its territory the Germans had discovered a site rich in dinosaur fossils, Tendaguru. Louis was told by C. W. Hobley, a friend of the family, that the British Museum of Natural History was going to send a fossil-hunting expedition to it. Louis applied and was hired to locate the site and manage the administrative details. In 1924 the party under William E. Cutler departed for Africa. They never found a complete dinosaur skeleton. Louis was recalled from the site by Cambridge in 1925, while Cutler contracted blackwater fever and died nine months later.

This critical experience changed Louis' career decision. Switching courses to anthropology, he found a new mentor in Alfred Cort Haddon, head of the department. In 1926 he graduated with a "double first", or high honours, in anthropology and archaeology. He had used some of his preexisting qualifications; for example, Kikuyu was offered and accepted as the second modern language in which he was required to be proficient, even though no one there could test him on it. The university accepted an affidavit from a Kikuyu chief signed with a thumbprint.

From 1925 on Louis lectured and wrote on African archaeological and palaeontological topics. On graduation he was such a respected figure that Cambridge sent him to East Africa to study prehistoric African humans. He excavated dozens of sites, undertaking for the first time a systematic study of the artifacts. Some of his culture names are still in use; for example, Elmenteitan.^[9]

Research fellow

St. John's College, Cambridge.

In 1927, Louis received a visit at a site called Gamble's Cave, near Lake Elmenteita, by two young ladies on a holiday, one of whom was Henrietta Wilfreda "Frida" Avern.^[10] She had done some course work in archaeology. Louis and she talked the entire night. They continued the relationship on his return to Cambridge and in 1928 they were married and set off together for Elmenteita. At that time he discovered the Acheulean site of Kariandusi, which he excavated in 1928, after collecting a team of interested associates.^[11]

On the strength of his work there he obtained a research fellowship at St. John's College and returned to Cambridge in 1929 to do post-graduate work and to classify and prepare the finds from Elmenteita. His patron and mentor at Cambridge was now Arthur Keith. While cleaning two skeletons he had found he noticed a similarity to one found in Olduvai Gorge by Professor Hans Reck, a German national, whom Louis had met in 1925 in Germany while on business for Keith.

Olduvai Gorge.

The geology of Olduvai was known. In 1913 Reck had extricated a skeleton from Bed II in the gorge wall. He argued that it must have the date of the bed, which was believed to be 600,000 years, in the mid-Pleistocene. The public was not ready for this news. Humans must have evolved or have been created long after then, was the general belief. Reck became involved in a media uproar. He was barred from going back to settle the question by the war and then the terms of the transfer of Tanganyika from Germany to Britain.^[12] In 1929 Louis visited Berlin to talk to the now skeptical Reck. Noting an Acheulean tool in Reck's collection of artifacts from Olduvai, he bet Reck he could find ancient stone tools at Olduvai within 24 hours.^[13]

Meanwhile Frida worked on illustrations for The Stone Age Culture of Kenya Colony. Louis was given the PhD in 1930 at age 27. His first child, a daughter, Priscilla Muthoni Leakey, was born in 1931. His headaches and epilepsy returned in the excitement and he was prescribed Luminal, which he took the rest of his life.

Reversals of fortune

The Defense of Reck

In November, 1931, Louis led an expedition to Olduvai, including Reck,^[14] whom he allowed to enter the gorge first. Louis did find Acheulean tools within the first 24 hours, costing Reck ten pounds on the bet. They verified the provenance of the 1913 find, now Olduvai Man. Non-humanoid fossils and tools were extracted from the ground in large numbers. Frida delayed joining him and was less enthusiastic about him on behalf of Priscilla. She did arrive eventually, however, and Louis put her to work. Frida's site became FLK, for Frida Leakey's karongo ("gully").

Back in Cambridge, the skeptics were not impressed. To find supporting evidence of the antiquity of Reck's Olduvai Man, Louis returned to Africa, excavating at Kanam and Kanjera. He easily found more fossils, which he named Homo kanamensis.^[15] While he was gone, the opposition worked up some "evidence" of the intrusion of Olduvai Man into an earlier layer, evidence that seemed convincing at the time, but is missing and unverifiable now. On his return Louis' finds were carefully examined by a committee of 26 scientists and were tentatively accepted as valid.

Scandal

With Frida's dowry money, the Leakeys bought a large brick house in Girton near Cambridge, which they named "the Close." She suffered from morning sickness most of the time and was unable to work on the illustrations for Louis' second book, Adam's Ancestors. At a dinner party given in his honor after a lecture of his at the Royal Anthropological Institute, Gertrude Caton-Thompson introduced him to her own illustrator, the twenty-year-old Mary Nicol.

Louis convinced Mary to take on the illustration of his book. A few months later companionship turned to romance. Colin Leakey was born in December, 1933, and in January, 1934, Louis asked Frida for a divorce. She would not sue for divorce until 1936.^[16]

A panel at Cambridge investigated his morals. Grants dried up, but his mother raised enough money for another expedition to Olduvai, Kanam and Kanjera, the latter two on the Winam Gulf.^[17] His previous work there was questioned by P. G. H. Boswell,^[18] whom he invited to verify the sites for himself. Arriving at Kanam and Kanjera in 1935, they found that the iron markers Louis had used to mark the sites had been removed by the Luo tribe for use as harpoons and the sites could not now be located. To make matters worse, all the photos Louis took were ruined by a light leak in the camera. After an irritating and fruitless two-month search, Boswell left for England, promising, as Louis understood it, not to publish a word until Louis returned.

Boswell immediately set out to publish as many words as he was able, beginning with an article in Nature dated 9 March 1935, destroying Reck's and Louis' dates of the fossils and questioning Louis' competence. Louis on his return accused Boswell of treachery, but Boswell now had public opinion on his side. Louis was not only forced to retract the accusation but also to recant his support of Reck.^[19] Louis was through at Cambridge. Even his mentors turned on him.

On the road in Africa

Meeting Mary in Africa, he proceeded to Olduvai with a small party. Mary joined him under a stigma but her skill and competence eventually won over the other participants. Louis' parents continued to urge him to return to Frida, and would pay for everyone in the party but Mary. Louis and his associates did the groundwork for future excavation at Olduvai, uncovering dozens of sites for a broad sampling, as was his method. They were named after the excavator: SHK (Sam Howard's karongo), BK (Peter Bell's), SWK (Sam White's), MNK (Mary Nicol's). Louis and Mary conducted a temporary clinic for the Maasai, made preliminary investigations of Laetoli, and ended by studying the rock paintings at the Kisese/Cheke region.^[20]

The Village of Nasty

Louis and Mary returned to England in 1935 without positions or any place to stay except Mary's mother's apartment. They soon leased Steen Cottage in Great Munden^[21] and lived without heat, electricity, or plumbing, fetching water from a well, huddling before a fireplace and writing by oil lantern. They lived happily in poverty for eighteen months at this low point of their fortunes, visited at first only by Mary's relatives. Louis gardened for subsistence and exercise and improved the house and grounds. He appealed at last to the Royal Society, who relented with a small grant to continue work on his collection.

In British East Africa

The Return of the Native Son

Louis had already involved himself in Kikuyu tribal affairs in 1928, taking a stand against female genital cutting. He got into a shouting match in Kikuyu one evening with Jomo Kenyatta, who was lecturing on the topic. R. Copeland at Oxford recommended he apply to the Rhodes Trust for a grant to write a study of the Kikuyu and it was given late in 1936 along with a salary for two years. In January 1937 the Leakeys shook the dust off their feet and travelled to Kenya. Colin would not see his father for 20 years.

Louis returned to Kiambaa near Nairobi and persuaded Senior Chief Koinange, who designated a committee of chiefs, to help him describe the Kikuyu the way they had been. Mary excavated at Waterfall Cave.^[22] She fell ill with double pneumonia and lay at death's door for two weeks in the hospital in Nairobi, during which time her mother was sent for. Contrary to expectation she recovered and began another excavation at Hyrax Hill and then Ngoro River Cave. Louis got an extension of his grant, which he used partially for fossil-hunting. Leakey discoveries began to appear in the newspapers again.

Tensions between the Kikuyu and the settlers increased alarmingly. Louis jumped into the fray as an exponent of the middle ground. In Kenya: Contrasts and Problems, he angered the settlers by proclaiming Kenya could never be a "white man's country."

The fossil police

The government offered Louis work as a policeman in intelligence, which he could not afford to refuse. He traveled the country as a pedlar, reporting on the talk. When Britain went to war in September, 1939, the Kenyan government drafted Louis into its African intelligence service.^[23]
Apart from some bumbling around, during which he and some settlers stalked each other as possible saboteurs of the Sagana Railway Bridge,^[24] his first task was to supply and arm Ethiopian guerrillas against the Italian invaders of their country. He created a clandestine network using his childhood friends among the Kikuyu. They also hunted fossils on the sly.

Louis conducted interrogations, analyzed handwriting, wrote radio broadcasts and took on regular police investigations. He loved a good mystery of any sort. The white leadership of the King's African Rifles used him extensively to clear up many cultural mysteries; for example, he helped an officer remove a curse he had inadvertently put on his men.^[25]

Mary continued to find and excavate sites. Jonathan Leakey was born in 1940. She worked in the Coryndon Memorial Museum (later called the National Museums of Kenya) where Louis joined her as an unpaid honorary curator in 1941. Their life was a menage of police work and archaeology. They investigated Rusinga Island and Olorgesailie. At the latter site they were assisted by a team of Italian experts recruited from the prisoners of war and paroled for the purpose.^[26]

In 1942 the Italian menace ended, but the Japanese began to reconnoiter with a view toward landing in force. Louis found himself in counter-intelligence work, which he performed with zest and imagination. Deborah was born, but died at three months. They lived in a rundown and bug infested Nairobi home, provided by the museum. Jonathan was attacked by army ants in his crib.^[27]

The turn of the tide

In 1944 Richard Leakey was born. In 1945 the family's income from police work all but vanished. By now Louis was getting plenty of job offers but he chose to stay on in Kenya as Curator of the Coryndon Museum, with an annual salary and a house, but more importantly, to continue palaeoanthropological research.

In January, 1947, Louis conducted the first Pan-African Congress of Prehistory at Nairobi. Sixty scientists from 26 countries attended, delivering papers and visiting the Leakey sites. The conference restored Louis to the scientific fold and made him a major figure in it. With the money that now poured in Louis undertook the famous expeditions of 1948 and beyond at Rusinga Island in Lake Victoria, where Mary discovered the most complete Proconsul fossil up to that time.

Charles Boise donated money for a boat to be used for transport on Lake Victoria, The Miocene Lady. Its skipper, Hassan Salimu, was later to deliver Jane Goodall to Gombe. Philip Leakey was born in 1949. In 1950, Louis was awarded an honorary doctorate by Oxford University.

Kenyan affairs

""... I sought a personal interview with the governor, hoping to make him appreciate that it was no longer possible to continue along the lines of the old colonial regime. ... Colonial governors and senior civil servants are not easy people to argue with; and, of course, I was not popular, because of my criticism of the colonial service ... Had it been possible to make the government open its eyes to the realities of the situation, I believe that the whole miserable episode of what is frequently spoken of as 'the Mau Mau rebellion' need never have taken place."

From L.S.B. Leakey, By the Evidence, Chapter 18.

While the Leakeys were at Lake Victoria, the Kikuyu struck at the European settlers of the Kenyan highlands, who seemed to have the upper hand and were insisting on a "white" government of a "white" Africa. In 1949 the Kikuyu formed a secret society, the Mau Mau, which attacked settlers and especially loyalist Kikuyu.

Louis had attempted to warn Sir Philip Mitchell, governor of the colony, that nocturnal meetings and forced oaths were not Kikuyu customs and foreboded violence, but was ignored. Now he found himself pulled away from anthropology to investigate the Mau Mau. During this period his life was threatened and a reward placed on his head. The Leakeys began to pack pistols, termed "European National Dress." The government placed him under 24-hour guard.

In 1952, after a massacre of loyal chiefs, the government arrested Jomo Kenyatta, president of the Kenya African Union. Louis was summoned to be a court interpreter, but withdrew after an accusation of mistranslation because of prejudice against the defendant. He returned on request to translate documents only. Because of lack of evidence linking Kenyatta to the Mau Mau, although convicted, he did not receive the death penalty, but was sentenced to several years of hard labor and banned from Kenya.

The government brought in British troops and formed a home guard of 20,000 Kikuyu. During this time Louis played a difficult and contradictory role. He sided with the settlers, serving as their spokesman and intelligence officer, helping to ferret out bands of guerrillas. On the other hand he continued to advocate for the Kikuyu in his book, Defeating Mau Mau and numerous talks and articles. He recommended a multi-racial government, land reform in the highlands, a wage hike for the Kikuyu, and many other reforms, most of which were eventually adopted.

The British realized the rebellion was being directed from urban centers, instituted military law and
rounded up the committees. Following Louis' suggestion, thousands of Kikuyu were placed in re-education camps and resettled in new villages. The rebellion continued from bases under Mt. Kenya until 1956, when, deprived of its leadership and supplies, it had to disperse. The state of emergency lasted until 1960. In 1963 Kenya became independent, with Jomo Kenyatta as prime minister.^[28]

Work in Palaeoanthropology

Vindication at Olduvai

"We know from the study of evolution that, again and again, various branches of animal stock have become over-specialized, and that over-specialization has led to their extinction. Present-day Homo sapiens is in many physical respects still very unspecialized− ... But in one thing man, as we know him today, is over-specialized. His brain power is very over-specialized compared to the rest of his physical make-up, and it may well be that this over-specialization will lead, just as surely, to his extinction. ... if we are to control our future, we must first understand the past better."

From L.S.B. Leakey, Adam's Ancestors, Fourth Edition, final page.

Louis and Mary spent all the time they could at Olduvai, starting in 1951. So far they had discovered only tools. A trial trench in Bed II at BK in 1951 was followed by a more extensive excavation in 1952. They found what Louis termed an Olduwan "slaughter-house", an ancient bog where animals had been trapped and butchered. Louis was so carried away that he worked without his hat and his hair was bleached white from the sun. They stopped in 1953.
In 1955 they excavated again with Jean Brown. She related that he preferred to be called Louis, was absent-minded, once had everyone looking for spectacles that were around his neck, wore pants with the buttons off and shoes with holes in them, charged about everywhere and once collapsed unconscious. He was completely happy.^[29]

In 1959 they decided to excavate Bed I. While Louis was sick in camp, Mary discovered the fossilized skull OH 5 at FLK, which Mary called "Our Man", and became "Dear Boy" and "Zinj." The question was whether it was a previous genus discovered by Robert Broom, Paranthropus, which Broom had taken not to be in the human line, or a different one, in it. Louis opted for Zinj, a decision opposed by Wilfrid Le Gros Clark, but one which attracted the attention of Melville Bell Grosvenor, president of the National Geographic Society. That contact resulted in an article in National Geographic^[30] and a hefty grant to continue work at Olduvai.

Also in 1960 Jack Evernden and Garniss Curtis, young geophysicists, dated Bed I to 1.75 mya. The world was stunned. Zinj was far older than anyone had imagined. Scientists swarmed to Africa. Reck and Louis were completely vindicated, too late for Reck, who had died in 1937.^[31]

Expansion

In 1960, unable to leave the museum except on weekends, Louis appointed Mary director of excavation at Olduvai. She brought in a staff of Kamba tribesmen, instead of Kikuyu, who, she felt, took advantage of Louis. The first, Muteva Musomba, had kept her children's ponies. He recruited Kamoya Kimeu among others. Mary set up Camp 5 under Jonathan's direction. He was 19. From then on she had her own staff and associates.

Mary picked and sieved at the site from early morning dressed in old clothes, chain smoking cigarettes, always surrounded by her Dalmatian dogs. She and Louis communicated by radio. On weekends he drove non-stop at high speed the 357 miles between Olduvai and Nairobi. The teenage boys, Richard and Philip, were on site holidays and vacations. Louis invited them and Irven DeVore to eat a raw rat so that he could compare the result to some Hominid coprolites. He said to DeVore, "My dear boy, let me make you famous." DeVore and the boys demurred.^[32]

Their home in Nairobi was chaotic, when they were there. Dinner guests were frequent. Important guests stayed for weeks if they could stand it. They shared the quarters and the dinner table with the Dalmatians, hyraxes, a monkey, a civet cat, an African eagle owl, tropical fish, snakes, such as vipers, and a python. The extended families of twenty African staff lived in cinderblock huts in the yard. Mary had switched to cigars and the ashes often fell into the food. Both Louis and Mary cooked. Louis never stopped talking; his stories were endless.^[33]

Floruit

Jonathan Leakey achieved some brief fame before he quit palaeoanthropology altogether. He started his own site, "Jonny's site" in the Leakey lingo, FLK-NN. There he discovered two skull fragments without the Australopithecine sagittal crest, which Mary connected with Broom's and Robinson's Telanthropus. The problem with it was its contemporaneity with Zinjanthropus. When mailed photographs, Le Gros Clark retorted casually "Shades of Piltdown." Louis cabled him immediately and had some strong words at this suggestion of his incompetence. Clark apologized.^[34]

Not long after, in 1960, Louis, his son Philip and Ray Pickering discovered a fossil he termed "Chellean Man", as it was in context with Olduwan tools, the first such find. After reconstruction Louis and Mary called it "Pinhead." It was subsequently included with Homo erectus and was in fact contemporaneous with Paranthropus, which on that account cannot have been in the human line. For many years Louis believed H. erectus was the user of the tools and Australopithecus was not. It is now conceded that both Hominid genera used them.

In 1961 Louis got a salary as well as a grant from the National Geographic Society and turned over the acting directorship of Coryndon to a subordinate. He created the Centre for Prehistory and Paleontology on the same grounds, moved his collections to it, and appointed himself director. This was his new operations center. He opened another excavation at Fort Ternan on Lake Victoria. Shortly after, Heselon discovered Kenyapithecus wickeri, named after the owner of the property. Louis promptly celebrated with George Gaylord Simpson, who happened to be present, aboard the Miocene Lady with "Leakey Safari Specials", a drink made of condensed milk and cognac.

In 1962 Louis was visiting Olduvai when Ndibo Mbuika discovered the first tooth of Homo habilis at MNK. Louis and Mary thought it was female and named her Cinderella, or Cindy. Phillip Tobias identified Jonny's Child with it and Raymond Dart came up with the name Homo habilis at Louis' request, which Tobias translated as "handyman."^[35] It was seen as intermediary between gracile Australopithecus and Homo.^[36]

Calico Hills

In 1959 Leakey, while at the British Museum of Natural History in London, received a visit from Ruth DeEtte Simpson, an archaeologist from California. Simpson had acquired what looked like ancient scrapers from a site in the Calico Hills and showed it to Leakey.
In 1963, Leakey obtained funds from the National Geographic Society and commenced archaeological excavations with Simpson. Excavations at the site carried out by Leakey and Simpson revealed that they had located stone artifacts which were dated 100,000 years or older, suggesting a human presence in North America much earlier than others had estimated.^[37]

The geologist Vance Haynes had made three visits to the site in 1973 and had claimed that the artifacts found by Leakey were naturally formed geofacts. According to Haynes, the geofacts were formed by stones becoming fractured in an ancient river on the site.^[38]

In her autobiography, Mary Leakey wrote that because of Louis's involvement with the Calico Hills site she had lost academic respect for him and that the Calico excavation project was "catastrophic to his professional career and was largely responsible for the parting of our ways".^[39]

The Trimates

One of Louis's greatest legacies stems from his role in fostering field research of primates in their natural habitats, which he understood as key to unraveling the mysteries of human evolution. He personally chose three female researchers, Jane Goodall, Dian Fossey, and Birute Galdikas, calling them The Trimates.^[40][41] Each went on to become an important scholar in the field of primatology.
While these three are the stars, it should be noted that Leakey also encouraged and supported many other Ph.D. candidates, most notably from Cambridge University.

The last years

Kenya became independent at noon on 12 December 1963, with Jomo Kenyatta as the first prime minister. The settlers were already leaving the country in large numbers. Kenyatta saw that he had to act swiftly to prevent a descent into chaos. He took a conciliatory view. There were a few deportations, but no reprisals. Louis had felt considerable trepidation about the future of palaeoanthropology in Kenya. A meeting was arranged between him and Jomo at the suggestion of the last colonial governor, Malcolm MacDonald. He was introduced by his old friend Peter Koinange. They spoke in Kikuyu. The meeting ended with an embrace and reassurances.^[42]

During his final years Louis became famous as a lecturer in the United States and United Kingdom. He brought audiences cheering to their feet. He did not personally excavate any longer, as he was crippled with arthritis, for which he had a hip replacement in 1968. He raised funds and directed his family and associates. In Kenya he was an indispensable facilitator for the hundreds of scientists then exploring the East African Rift system for fossils. Without his say-so, permits could not be obtained and access to museum collections was denied. Once he gave permission, his advice was invaluable.

In 1963 he helped Ruth De Ette get started at a site in the Calico Hills of the Mojave Desert in California. The date then accepted for the arrival of humans in the Americas was about 12,000 BCE. On the basis of the time required for the evolution and distribution of native American languages, Louis hypothesized that the arrival must have been thousands of years previously. He encouraged Ruth to view the apparent artifacts she was finding as older than 100,000 years.

Mary did not share his visionary view. She was increasingly disrespectful, viewing him as incompetent, from 1963 on. The old intimacy was gone. Her professional opposition began over Calico Man. Under the rationale of trying to stop Louis from making a mistake that would tarnish his reputation, she persuaded the National Geographic Society to refrain from publishing Calico and pull funding from the project, but Louis found other means. On 26 March 1968, Alan and Helen O'Brien of Newport Beach, California, and some prominent Californians formed the Leakey Foundation.
When Louis stayed with them when he was in California, the O'Briens noticed that he was very much underpaid on the lecture circuit. From then on Louis worked with them in fund-raising.

Mary's opposition soon turned into a major schism in the palaeoanthropological village. For example, in 1968 Louis refused an honorary doctorate from the University of Witwatersrand in Johannesburg, primarily because of apartheid in South Africa. Mary accepted one. Now it was Louis' turn to be concerned about her reputation. The two still cared about each other, but were apart and conducted different professional lives.^[43]

In the last few years Louis' health began to fail more seriously. He had his first heart attacks and spent six months in the hospital. An empathy over health brought him and Dian Fossey together for a brief romance, which she broke off. Richard began to assume more and more of his father's responsibilities, which Louis resisted, but in the end was forced to accept. Everything bad seemed to happen to him in a run of unfortunate luck: he had more heart problems, he was swarmed by bees and nearly killed, he had a stroke, he was involved in controversy over Calico Man, and he had to brook Mary's opposition. One good thing that happened is that he found increasing support and comfort in his friend Vanne Goodall (mother of Jane Goodall), whose London apartment Louis visited when he could.^[44]

Death and legacy

Death

On 1 October 1972, Louis was stricken with heart attack in Jane Goodall's apartment in London. Jane sat up all night with him in St. Stephen's Hospital and left at 9:00 a.m. He died 30 minutes later at the age of 69.

Mary wanted to cremate Louis and fly the ashes back to Nairobi. Richard intervened. Louis was flown home and interred at Limuru, near the graves of his parents.

In denial, the family did not face the question of a memorial marker for a year. When Richard went to place a stone on the grave he found one already there, courtesy of Rosalie Osborn. The inscription was signed with the letters, ILYFA, "I'll love you forever always", which Rosalie used to place on her letters to him. Richard left it in place.^[45]

Prominent organizations

• 1958. Louis founded the Tigoni Primate Research Center with Cynthia Booth, on her farm north of Nairobi. Later it was the National Primate Research Center, currently the Institute of Primate Research, now in Nairobi. As the Tigoni center, it funded Leakey's Angels.
• 1961. Louis created the Centre for Prehistory and Paleontology on the same grounds as Coryndon Museum, appointing himself director.
• 1968. Louis assisted with the founding of The Leakey Foundation, to ensure the legacy of his life's work in the study of human origins. The Leakey Foundation exists today as the number-one funder of human-origins research in the United States.

Prominent family members

Louis Leakey was married to Mary Leakey, who made the noteworthy discovery of fossil footprints at Laetoli. Found preserved in volcanic ash in Tanzania, they are the earliest record of bipedal gait.

He is also the father of paleoanthropologist Richard Leakey and the botanist Colin Leakey. Louis' cousin, Nigel Gray Leakey, was a recipient of the Victoria Cross during World War II.

Position in the Leakey family

Frida Avern

Louis Leakey

Mary Leakey, nee Nichol

Colin Leakey

Meave Epps

Richard Leakey

Margaret Cropper

Jonathan Leakey

Philip Leakey

Louise Leakey

Emmanuel de Mérode

Books by Louis Leakey

Louis's books are listed below.^[46] The gaps between books are filled by too many articles to list. It was Louis who began the Leakey tradition of publishing in Nature.

First Publication Date	Title	Notes
1931	The Stone Age Culture of Kenya Colony	Written in 1929. Illustrated by Frida Leakey.
1934	Adam's Ancestors: The Evolution of Man and His Culture	Multiple editions with rewrites, the 4th in 1955. Illustrated by Mary Leakey. Book reviews:[47]
1935	The Stone Age races of Kenya	Proposes Homo kanamensis.
1936	Kenya: Contrasts and Problems	Written in 1935.
1936	Stone Age Africa: an Outline of Prehistory in Africa	Ten chapters consisting of the ten Munro Lectures delivered in 1936 by Louis to Edinburgh University and intended by him as a textbook. Illustrated by Mary.
1937	White African: an Early Autobiography	Louis described it as a "pot-boiler" written in 1936 for Hodder & Stoughton.
1951	The Miocene Hominoidea of East Africa	With Wilfrid Le Gros Clark. Volume I of the series Fossil Mammals of Africa published by the Natural History Museum in London.
1951	Olduvai Gorge: A Report on the Evolution of the Hand-Axe Culture in Beds I-IV	Started in 1935. Names the Olduwan Culture.
1952	Mau Mau and the Kikuyu	Online at[48] Quaestia.
1953	Animals in Africa	Photographs by Ylla.
1954	Defeating Mau Mau	With Peter Schmidt. Online at[49] Quaestia.
1965	Olduvai Gorge: A Preliminary Report on the Geology and Fauna, 1951-61	Volume 1.[50]
1969	Unveiling Man's Origins	With Vanne Morris Goodall.
1969	Animals of East Africa: The Wild realm
1970	Olduvai Gorge, 1965-1967
1974	By the Evidence: Memoirs, 1932-1951	Written in 1972 and published posthumously. Louis finished writing on the day before his death.
1977	The Southern Kikuyu before 1903	Published posthumously. The manuscript remained in Louis' safe for decades for lack of a publisher. It was 3 volumes. He refused to follow editorial advice and shorten it.