Have you ever wondered why our ears look the way they do? That soft, curved shape we rarely think twice about might actually ...

Humans' outer ears may have evolved from the gills of prehistoric fish, a new study finds. Gene-editing experiments indicate ...

It turns out the human ear got off to a fishy start. Literally. A fascinating new study reveals that the mammalian outer ear ...

Did you know some fish have lungs? Ask most people what makes ... Lungfish still have gills, but in most of the lungfish species alive today, those gills are atrophied, meaning they are present ...

What is a betta fish? Betta fish—also known as ... which is attached to the gills and functions similarly to a human lung. Although the species is renowned for its stunning appearance, wild ...

Fish have a circulatory systems with just one circuit. Their hearts pump oxygen poor blood to their gills, where oxygen is absorbed from the water. The blood then flows around the fish's body and ...