Paranthropus boisei had human-like hand proportions but its wrist lacked the highly adaptive structure found in Neanderthals and later humans, while its grasp was powerful and gorilla-like.
Sources
- Discovery of First Fossil Hand Linked to P. Boisei Suggests ... (smithsonianmag.com)
- https://www.nature.com/articles/s41586-025-09594-8 (nature.com)
- https://www.cnn.com/2025/10/15/science/fossil-kenya-extinct-human-hand (cnn.com)
- https://news.stonybrook.edu/newsroom/new-fossil-of-an-ancient-human-relative-shows-it-could-grip-and-had-surprising-dexterity/ (news.stonybrook.edu)
- https://archaeologymag.com/2025/10/paranthropus-boisei-had-human-like-grip/ (archaeologymag.com)
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