CiNii Books - The fossil trail : how we know what we think we know about human evolution

One of the most remarkable fossil finds in history occurred in Laetoli, Tanzania, in 1974, when anthropologist Andrew Hill (diving to the ground to avoid a lump of elephant dung thrown by a colleague) came face to face with a set of ancient footprints captured in stone-the earliest recorded steps of out far-off human ancestors, some three million years old. Today we can see a recreation of the making of the Laetoli footprints at the American Museum of Natural History, in a stunning diorama which depicts two of our human forebears walking side by side through a snowy landscape of volcanic ash. But how do we know what these three-million-year-old relatives looked like? How have we reconstructed the eons-long journey from our first ancient steps to where we stand today? In short, how do we know what we think we know about human evolution. In The Fossil Trail, Ian Tattersall, the head of the Anthropology Department at the American Museum of Natural History, takes us on a sweeping tour of the study of human evolution, offering a colourful history of fossil discoveries and a revealing insider's look at how these finds have been interpreted -and misinterpreted-through time. All the major figures and discoveries are here. We meet Lamark and Cuvier and Darwin (we learn that Darwin's theory of evolution, though a bombshell, was very congenial to a Victorian ethos of progress), right up to modern theorists such as Niles Eldredge and Stephen Jay Gould. Tattersall describes Dubois's work in Java, the may discoveries in South Africa by pioneers such as Raymond Dart and Robert Broom, Louis and Mary Leakey's work at Olduvai Gorge, Don Johanson's famous discovery of "Lucy" (a 3.4 million-year-old femail hominid, some 40 per cent complete), and the more recent discovery of the "Turkana boy", even more complete than "Lucy" and remarkably similar to modern human skeletons. He discusses the may techniques available to analyse finds, from Flourine analysis (developed in the 1950s, it exposed Piltdown as a hoax) and a radiocarbon dating to such modern techniques as electron spin resonance and the analysis of human mitochondrial DNA. He gives us a succinct picture of what we presently think our family tree looks like, with at least three general and perhaps a dozen species through time (though he warns that this greatly underestimates the actual diversity of hominids over the past two million or so years). And he paints a vivid, insider's portrait of paleontology, the dogged work in the broiling sun, searching for a tooth or a fractured corner of bone amid stone litter and shadows, with no guarantee of ever finding anything. And perhaps most important, Tattersall looks at all these great researchers and discoveries with the context of their social and scientific milieu, to reveal the insidious ways that the received to reveal the insidious ways that the received wisdom can shape how we interpret fossil findings, that what we expect to find colours our understanding of what we do find.

Table of Contents

Preface
1. Before Darwin
2. Darwin and after
3. Pithecanthropus
4. The early twentieth century
5. Out of Africa
6. ... Always something new
7. The synthesis
8. Olduvai gorge
9. Rama's ape meets the mighty molecule
10. Omo and Turkana
11. Hadar, Lucy and Laetoli
12. Theory intrudes
13. Eurasia and Africa: Odds and ends
14. Turkana and Olduvai - again
15. The cave-man vanishes
16. Candelabras and continuity
17. So, where are we?
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The fossil trail : how we know what we think we know about human evolution

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