What scientists called one cavefish turned out to be three. A new cavefish species had been evolving in isolation for eight ...

Astyanax mexicanus cave fish have adapted to an incredibly tough environment: chilly, pitch-dark caves that flood about once a year, providing brief feasts separated by long periods of starvation.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The previously unknown ...

At the center of the discovery is the Mexican tetra, a species known for its remarkable adaptability.

Living in perpetual darkness deep beneath the ground, cave fish are odd little creatures. With reduced eyes and pale coloration, they were thought to found on every continent except Antarctica and ...

Creatures that spend their lives in dark caves tend to be changed by the experience. Gollum lost the hair on the tops of his feet and his taste for cooked food. Mexican cave fish lost their eyes.

Studies of insulin, blood sugar and diabetes in other animals such as fish and dogs have already saved millions of lives and could lead to new treatments for type 1 and type 2 diabetes. This video is ...

Although we look very different from many of the other creatures on this planet, we’re more connected than you might think. Our evolutionary history means we share many of the same genes and ...

A cave-dwelling fish has been swimming the waters of India unknowingly. But researchers have just discovered the mysterious fish, which they named Schistura densiclava, in Meghalaya’s Krem Mawjymbuin ...