Mammals live all across the world. They can be found living in the ground, in trees, and even in the sea. There are many different kinds of mammal, including us humans! Find out more about ...

Mammals with pouches, like kangaroos and koalas, have a radical evolutionary history that suggests they are "more evolved" than previously thought, a new study finds. Marsupials used to be ...

Although they came into their own only after the extinction of the dinosaurs some 65 million years ago, mammals had maintained a low-profile existence for some 150 million years before that.