Rodents may have a rule of thumbnails. Many rodents have curved claws that help the animals climb or dig. But most also have flat nails on their thumbs, researchers report in the Sept. 4 Science. This ...

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 ...

Unlike most modern mammals, which get just two sets of teeth in their lifetime, an ancient species from the Cretaceous, found ...

Foot bones that are separate in small hopping rodents are fused in their larger cousins, and a team of researchers at the University of Michigan and University of California, San Diego wanted to know ...

What may have looked like a cross between a platypus and a beaverlike rodent and lived around 120 million years ago?

The discovery of new cynodont fossils from southern Brazil by a team of palaeontologists has led to a significant breakthrough in understanding the evolution of mammals. These fossils, belonging to ...

Foot bones that are separate in small hopping rodents are fused in their larger cousins, and a team of researchers wanted to know why. Foot bones that are separate in small hopping rodents are fused ...