| Collapse: How Societies Choose to Fail or Succeed Paperback | Sapiens: A Brief History of Humankind Paperback• Baltimore: Johns Hopkins University Press |
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| 21 Lessons for the 21st Century Hardcover• | Global Mammal Assessment Team 2008 |
wadjakensis Dubois, 1921 A reconstruction of Australopithecus afarensis, a human ancestor that had developed bipedalism, but which lacked the large brain of modern humans.
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