The discovery of a golden scaleless fish in China is helping scientists understand how animals evolved to live in caves.

Four fish are part of China's first in-orbit aquatic ecological research project. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Zebrafish ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The previously unknown Xingren golden-line fish appears to be still evolving for cave life. . | ...