The small, plant-eating Lystrosaurus thrived post-extinction, while its predators suffocated to death. Its eggs played a critical role.

Discovery of a Lystrosaurus embryo inside an egg proves early mammal relatives laid eggs and survived mass extinction through ...

Detailed imaging of a 250-million-year-old fossil has revealed the first proof that the ancestors of mammals laid eggs. The discovery answers a long-standing question about the reproductive biology of ...

In the aftermath of Earth’s most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: Lystrosaurus. Now, a stunning fossil discovery—an ancient egg containing a ...

Researchers studying a 250-million-year-old fossil have found the first ever proof that mammal ancestors laid eggs, with the discovery also shedding light on a remarkable survival story.

Researchers studying a 250-million-year-old fossil have found the first ever proof that mammal ancestors laid eggs, with the discovery also shedding light on a remarkable survival story. The fossil, ...

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

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

The little skeleton was curled so tightly it looked as if it had never really entered the world. For years, that mattered because paleontologists suspected they were looking at something unusual, a ...