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What features of the Australopithecus sediba hand may have helped it use simple tools?

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Side view illustration of Australopithecus afarensis, an early human ancestor, shown walking upright with a hairy body and ape-like facial features. A scale beside the figure marks 12 inches and 40 centimeters. — Australopithecus Artist's rendering of *Australopithecus afarensis*, which lived from 3.8 to 2.9 million years ago.

The hand of Australopithecus sediba, particularly as observed in the adult female specimen (MH2), features a unique combination of traits that distinguish it from earlier australopiths and apes. Specifically, the hand displays shorter fingers and an elongated thumb.12

These anatomical adaptations are significant because they provided the dexterity necessary to manipulate small objects. Paleoanthropologists have speculated that these structural changes, potentially in combination with the reorganization of the brain, may have enabled A. sediba to make and use simple tools, including stone tools. While these features suggest an advanced capacity for tool use—possibly even more so than that of Homo habilis—it is important to note that no tools were actually discovered at the Malapa Cave site.21