According to most experts, the first mammal was Morganucodon, a small, shrew-like rodent that appeared during the Jurassic Period, approximately 200 million years ago. It weighed a few ounces and ...

Scientists discovered three new mammal species that survived in Alaska’s ancient Arctic during the age of dinosaurs.

Curious minds have asked the same question for centuries: Did mammals hatch from eggs? It might sound ludicrous given what we know about modern mammals. However, this was not the case for the ...

Why did our ancestors ditch the shell and start growing babies inside their bodies instead? In this episode of Big Ideas, from the team behind Deep Look, Niba zooms out to explore one of evolution’s ...