What We Can Learn from a 1.9-Million-Year-Old Hand

Fossils from Australopithecus sediba demonstrate "a surprisingly advanced but small brain, a very evolved hand with a long thumb like a human, a very modern pelvis, but a foot and ankle shape never seen in any hominin species that combines features of both apes and humans in one anatomical package," says Dr. Lee Berger of Wits University, Johannesburg

Sediba's hand is unique because it has shortened fingers and a very long thumb, but at the same time very powerful muscles for grasping, making it a hand capable of tool manufacture and use, but still able to climb.

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