Learn about a small rodent-like mammal whose descendants survived the extinction event that killed all non-avian dinosaurs.

A newly discovered prehistoric mammal may hold clues to how life survived the dinosaur-killing extinction. The tiny species, ...

Mammals and dinosaurs coexisted on Earth until a catastrophic event 66 million years ago killed 75% of life on the planet.

Scientists have identified a new prehistoric mammal species, Cimolodon desosai, from a rare fossil in Baja California that ...

On the final day of the Cretaceous period, some 66 million years ago, Earth was teeming with a dazzling variety of dinosaurs.

True extinction is final, a point of no return where a species disappears forever. And sadly, species go extinct all the time ...

A badly mangled dinosaur skull, once forgotten in a drawer, turned out to be a rare and important discovery. Reconstructed by ...

When the big asteroid hit Mexico 66 million years ago, it set off wildfires, tsunamis and massive clouds of dust that darkened the skies, killed much of Earth’s plant life and triggered a chain of ...

Rocks formed immediately before and after non-avian dinosaurs went extinct are strikingly different, and now, tens of millions of years later, scientists think they’ve identified the culprit—and it ...

Some octopuses that lived over 72 million years ago were as long as whales. These huge predators may have been the largest ...

A new species of dinosaur, nicknamed a “murder muppet,” was discovered by an undergraduate student at Virginia Tech. His ...