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About 3.5 million years ago, the earth entered a warm phase when lush abundance returned throughout the world including east Africa where humans first evolved. A species of upright ape may have begun consuming a large amount of scavenged (leftover) meat causing the stomach and intestines to reduce by 40% and brain and body size to enlarge.
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(Illustrations from Evolving Eden: An Illustrated Guide to the Evolution of the African Large Mammal Fauna, by Mauricio Anton and Alan Turner. Copyright © 2004. Columbia University Press. Reprinted with permission of the publisher) |
  Turkana-Koobi ForaE. AFRICA DEPICTED OVER 3 MILLION YEARS AGO
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