Mammalian outer ear traced back to ancient fish gills

PHYSorg
Jan 9, 2025, 11:00 am148 pts
The outer ear is unique to mammals, but its evolutionary origin has remained a mystery. According to a study published in Nature from the USC Stem Cell lab of Gage Crump, this intricate coil of cartilage has a surprisingly ancient origin in the gills of fishes and marine invertebrates.

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