The fossil researchers have dubbed the "world's oldest bug" is older than any fossil of an insect, arachnid, or related creepy-crawly.

The jaws of the ancient giant Titanichthys, an armored fish, suggest how it gathered food.

A reptile from the Late Cretaceous had unusual tooth enamel, report researchers. "Priosphenodon has the strangest teeth I have personally ever seen."

A reptile from the Late Cretaceous had unusual tooth enamel, report researchers. "Priosphenodon has the strangest teeth I have personally ever seen."

The Barada Barna people discovered the fossil remains of some remarkably large Australian megafauna, including huge kangaroos and lizards.

The Barada Barna people discovered the fossil remains of some remarkably large Australian megafauna, including huge kangaroos and lizards.

Looking at fossilized and modern Ginkgo biloba tree leaves gives researchers an overview of climate change over the scale of millions of years.

Fossils from Spinosaurus aegyptiacus may be "smoking gun" evidence it lived in the water. That could upend the idea that there were no swimming dinosaurs.

Long-used approaches for reconstructing evolutionary paths, or "trees of life," are deeply flawed, say researchers in a new paper.

The discovery of a 29 million-year-old fossil heralds the coquí frog, the national symbol of Puerto Rico, as the oldest frog in the Caribbean.