According to a new study, the first louse to take up residence on a mammalian host likely started out as a parasite of birds. That host-jumping event tens of millions of years ago began the long ...

The definition of a mammal is a warm-blooded vertebrate animal distinguished by the possession of hair or fur, the secretion of milk by females for nourishing their young, and the birth of live ...

Two brand-new species of early mammals from the Jurassic period have been discovered, revealing the secrets of how we got our ears. These new species are hoped to give paleontologists insight into how ...

Illustration showing Repenomamus robustus as it attacks Psittacosaurus lujiatunensis moments before a volcanic debris flow buries them both, ca. 125 million years ago. (Michael Skrepnick via ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. This voice experience is generated by AI. Learn more. This ...