When you and I take a deep breath, we pull air into our lungs. That’s because humans are mammals. But fish aren’t mammals. They usually don’t breathe air. They usually don’t have lungs. That’s what I ...

A collaborative team of scientists recently found that there is no physiological evidence supporting a leading theory -- which involves the surface area of fish gills -- as to why many fish species ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The human outer ear may have arisen from ancient fish gills. | Credit: A. Martin UW ...

Fish gills are shaped like a heart. Not moving water back and forth, as we do with the air we breathe, saves fish considerable energy. The average fish uses muscles to pump water into its mouth and ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Some teenage Japanese eels have found a way to avoid becoming a fish ...

LOS ANGELES — Scientists have made a groundbreaking discovery about the origins of the human outer ear, revealing that this distinctive mammalian feature evolved from an unexpected source: fish gills.