More than 400 million years ago, ancient oceans were teeming with many fish that might seem alien in today’s seas. Back then some wore plates of bony armor and lacked jaws, such as the arandaspids, ...

About 350 million years ago, your evolutionary ancestors—and the ancestors of all modern vertebrates—were merely soft-bodied animals living in the oceans. In order to survive and evolve to become what ...

Q: How did fish get onto land if they couldn't breathe? TD: Very early in their evolution, fishes had lungs while they were still aquatic, so the transition to breathing air was no problem. Many kinds ...

The extinct animal's face structure could help explain how vertebrates, including ourselves, evolved our distinctive look.

(CNN) — The sensitive interior of human teeth might have originated from a seemingly unlikely place: sensory tissue in fish that were swimming in Earth’s oceans 465 million years ago. While our teeth ...

The bulbous-eyed mudskipper could offer key clues about how our fishy ancestors first made the leap to land. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

A newly discovered 310-million-year-old fossilised fish is the earliest known example of one with extra teeth deep inside its mouth. The ray-finned fish found in Staffordshire evolved a "unique" way ...