Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 26 - Self-Quiz - Page 447: 5



Work Step by Step

Australopithecus afarensis footprints were found in Tanzania. This species seemed to have walked the earth from 3.9 to 3 million years ago. From the prints, scientists deduced that the australopiths walked in an upright manner because the footprints revealed a deep arch in the foot and that the big toes were aligned with the other toes; these two characteristics are essential to bipedal movement.
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