One small fish in Thailand could hold insights into the evolution of life on earth and how primitive ocean-dwellers developed into animals that could walk on land. Researchers from the New Jersey ...

Blind and sighted Mexican tetra fish live side by side in an underground lake, providing a genetic clue to how creatures ...

Blind cavefish whose eyes have withered away may not be so blind after all. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content. Instead, a ...

Keep them in the dark for a million years. Then cross two strains of cave-dwelling fish, now totally blind. It turns out some of their kids will be able to see. Fish and other creatures lose their ...

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

Every group of Mexican tetra fish speaks with a different accent. Scientists studied both the blind cave-dwelling populations and those that live in rivers. They all communicate using a series of ...

Add Yahoo as a preferred source to see more of our stories on Google. A living specimen of the new species, Sinocyclocheilus longicornus, in a laboratory tank. A living specimen of the new species, ...

Many grad students can sympathize with the blind form of the Mexican tetra. Researchers speculate they sleep only a few hours a night, because they simply don't have time to rest. Subscribe to read ...

The cave formations in China's southwest Guangxi Zhuang region almost look like a different world. Centuries of dissolving limestone rock, a geological process known as karst, have resulted in ...

Millions of years ago, a small, unremarkable fish called the Mexican tetra started swimming into the caves of eastern Mexico. In the all-encompassing darkness of these limestone caverns, the tetras’ ...

The blind cavefish has a problem. In the absolute blackness where it lives, no light illuminates its world. Yet the small fish has traded its eyesight for a different way to perceive its environment: ...