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.

In laboratory experiments, researchers have produced ear cartilage that remains form-stable in animal models. Only one ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...

Evolution is a master recycler. It often uses old structures (or ancient genes) for new jobs. The mammalian ear is a perfect example. Over the eons, the jawbones of our fish ancestors became three ...

For most animals, ears are necessary survival tools, allowing them to communicate with others and listen for predators. Chickens have small openings on the sides of their heads which are often covered ...