Mammal bones, especially skulls, are used for identification, and to work out the evolutionary history of each species. The jaws of a house cat are more lion- than wolf-like, for example. The teeth of ...

When an asteroid hit the Earth 66 million years ago, it set off a devastating mass extinction. The dinosaurs (except for a few birds) all died out, along with lots of the mammals. But some small ...

If textbooks ever made you believe mammals like humans, cats, and kangaroos first evolved somewhere up north, think again. A remarkable discovery from Australia has flipped our understanding of mammal ...

A study of fossil teeth from China shows early mammals got bigger before their diets became specialized after the ...

Life on Earth is undergoing a period of mass extinction—the sixth in history, and the first caused by humans. As species disappear at an alarming rate, we have learned that we understand only a ...

A new model suggests that in 250 million years, all land will collide into a supercontinent that boosts warming and pushes mammals to extinction. By Carl Zimmer It’s been about 250 million years since ...