(CNN) — The story of two of the strangest animals on the planet just got a little stranger, thanks to clues revealed by a lone fossil specimen that scientists now say represents a long-extinct ...

Which group of mammals has the more 'primitive' reproductive strategy -- marsupials, with their short gestation periods, or humans and other placental mammals, which have long gestation periods? For ...

At a time when the vast majority of mammals were the size of shrews and mice, Vintana sertichi was a super heavyweight. Researchers have unearthed the skull of a primitive mammal with remarkably keen ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Kevin Omland, University of Maryland, Baltimore County (THE CONVERSATION) We humans ...