University of Washington scientists have made a remarkable discovery: real teeth growing on the forehead of a deep-sea ratfish. This finding sheds light on the unique adaptations in fish anatomy, ...

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, ...

Scientists counted more than 10,000 teeth to find out how quickly the fish regrows its lost chompers. Gerald Corsi via Getty Images If you're a tasty squid or crab, a Pacific lingcod’s mouth is the ...

Complex teeth with multiple cusps in an African cichlid fish. The cichlid fish of Africa's Great Lakes have formed new species more rapidly than any other group of vertebrates. A new study shows that ...

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.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...

One fish, two fish. Green fish, blue fish. Outer teeth, inner teeth. These fish grow a lot of teeth. By Annie Roth If there is one place you don’t want to stick your finger, it’s the mouth of a ...

Add Yahoo as a preferred source to see more of our stories on Google. Fossils of the ancient armored fish Romundina gagnieri reveal that early vertebrates had teeth growing on dental plates rather ...