CT Scan of Ancient Earbone (IMAGE)

Vanderbilt University

CT Scan of Ancient Earbone

Caption

A CT scan of the 30-million-year-old earbone revealed cochlear coiling with more turns than in animals with echolocation, indicating hearing more similar to the cloven-hooved, terrestrial mammals dolphins came from than the sleek sea creatures they are today.

Credit

Rachel Racicot/Vanderbilt University

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