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 new discovery is shedding light on one of the greatest survival stories in Earth’s history, and answering a decades-old scientific mystery. Lystrosaurus, a hardy, plant-eating mammal ...

As we move through the Sixth Extinction, it can be beneficial to examine what caused massive die-offs in the past. Lystrosaurus specimens from South Africa have been found that may help clarify what ...

That matters because Lystrosaurus was no obscure reptile-like relic. It was one of the great survivors of the end-Permian mass extinction, the catastrophe about 252 million years ago that wiped out ...

(CNN) - Researchers said a fossil found in South Africa proves for the first time that mammal ancestors laid eggs. The fossil belongs to a tightly-curled embryo of a Lystrosaurus. The Lystrosaurus is ...