2-Million-Year-Old Fossils Reveal What’s Up with Ancient Thumbs – Inside Science News Service

(Inside Science) — Ancient thumbs now suggest human-like manual dexterity may have begun emerging by about 2 million years ago, shedding new light on previous research concerning the rise of advanced tool use, a new study finds. 
The ability to make and use complex tools depends not just on the extraordinarily powerful human brain, but also on the dexterity of the human hand. However, there has been a great deal of conflicting evidence surrounding when complex tools developed, when advanced manual…

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