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 ...

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

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 ...

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 ...

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 ...

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 ...

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, ...

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 ...

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: ...

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’ ...