Mosasaurs were enormous reptiles best known for ruling ancient oceans more than 66 million years ago, but new evidence suggests some also lived in rivers. Scientists reached this conclusion after ...

Have you ever wondered if slugs can smile — or if they even have teeth? How a slug eats is surprisingly complex!

UChicago paleontologists use CT scanning and simulations to show how a 250-million-year-old mammal predecessor could hear ...

Video by @zookeeperguyHippos have four canines one in each corner in the front of their mouth. But if you look along here, you can see that they’re not the same. The big lower canines, those is the ...

A surprising fossil find shows that some mosasaurs lived in ancient rivers as oceans changed near the end of the Cretaceous.