Learn more about the amblyopsid cavefishes, the eyeless fish that inhabit the caves of eastern North America, whose evolution can uncover the age of difficult-to-date cave systems. This is the Hoosier ...

If you're reading this sentence, you might have a fish to thank. Fish were the first animals to evolve jaws. They use their jaws primarily to eat, but also for defense, as tools—such as to burrow or ...

A 300-million-year-old fish fossil unearthed from a coal field in England has preserved something paleontologists almost ...

Experts have uncovered the earliest known example of a fish with extra teeth deep inside its mouth—a 310-million-year-old fossilized ray-finned fish that evolved a unique way of devouring prey.

It was a stroke of luck that led to the discovery. Scientists discovered a previously unknown species of blind cavefish after ...

A tiny, nearly transparent fish found in borewell water in Bihar has been identified as both a new species and a new genus of ...

A new study has rewritten a key chapter in the story of vertebrate evolution. Researchers from the University of São Paulo (USP) in Brazil and the Smithsonian Institution in the United States have ...

It’s not what you do, it’s how readily you do it. Rapid evolutionary change might have more to do with how easily a key innovation can be gained or lost rather than with the innovation itself, ...

There are a small number of biological rules that hold across every vertebrate: a ...

When animals evolved placentas to feed their young, it may have allowed them to be less picky about their sexual partners WHEN fish evolved placentas, it may have shifted how they pick sex partners.