Opposable Thumb

Opposable Thumb

Filed under: Brain evolution, cognitive capacities

by Pamela J. Hines (Science  23 Apr 2021:Vol. 372, Issue 6540, pp. 357) Hand bones of australopithecine hominid fossils dated to over 2 million years ago have a long, slender thumb that may have added dexterity. Karakostis et al. add muscle to the story of hand evolution with their analysis of torque at the thumb …

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