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

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

Using synchrotron X-ray CT scans of a fossilized, intact embryo, researchers found evidence that the plant-eating mammal Lystrosaurus laid eggs, which answers a key question about mammalian evolution.

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 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 ...

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 ...