Thrinaxodon jaw hearing (VIDEO)

University of Chicago

Caption

3D models of the jaw and associated middle ear bones of the Triassic mammal ancestor Thrinaxodon show that the switch to mammal-like hearing with an eardrum evolved much earlier than previously thought. (Credit: April I. Neander, Alec Wilken)

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April I. Neander, Alec Wilken

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Please credit April I. Neander, Alec Wilken

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