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 ...

The jackalope is mythical, but Wyoming was home to an actual prehistoric rodent with two large horns on its head. The Ceratogaulus is one of the ...

The arrangement of the bones that form the joint (the articulation) between the lower jaw and the skull is a key hallmark of vertebrates. Their configuration has long been used to draw a line in the ...

Explore mammals’ surprising origins, long before the age of dinosaurs. The surprising story of mammal evolution begins long before the age of dinosaurs. Witness how some of our prehistoric mammal ...