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

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

A 289-million-year-old reptile fossil discovered near Richards Spur has provided the earliest known evidence of a breathing ...

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

Researchers studying a 250-million-year-old fossil have found the first ever proof that mammal ancestors laid eggs, with the ...

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

The little skeleton was curled so tightly it looked as if it had never really entered the world. For years, that mattered ...

In the aftermath of Earth’s most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: ...

Scientists studying a 250-million-year-old fossil say they can now say with confidence that our mammal ancestors laid eggs. The fossil, found in South Africa, belonged to an embryo of the Lystrosaurus ...

Detailed imaging of a 250-million-year-old fossil has revealed the first proof that the ancestors of mammals laid eggs. The ...

Did mammals hatch from eggs? It might sound ludicrous given what we know about modern mammals. However, this was not the case ...

A remarkable discovery answers one of the greatest survival stories in Earth’s history—and a decades-old scientific mystery.