Caviomorph rodents represent a remarkable adaptive radiation of hystricognath rodents in South America, having colonised the continent from African ancestors in the Eocene. Once isolated on the newly ...

Mammals, including humans, stand out with their distinctively upright posture, a key trait that fueled their spectacular evolutionary success. Yet, the earliest known ancestors of modern mammals more ...

A fossil mammal tooth smaller than a grain of rice does not announce itself loudly. It must be hard won from sediment and ...

The humble rodent “thumb” may not seem like an obvious window into evolution, but its keratinized tip – the unguis (hoof, claw, or nail) – turns out to reveal striking insights into rodent history and ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Paleontologists have uncovered a previously unknown prehistoric mammal ...

The legions of squirrels breaking into backyard bird feeders benefit from a surprising trait developed over millions of years—tiny hands with four claws and a human-looking thumbnail. This combination ...