The largest dinosaurs – known as titanosaurs – measured up to 38 meters in length, eight meters in height, and weighing just ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, new research has revealed.

Why did mammals grow so big? Scientists believe that mammals evolved to fill the vacant ecological niches after the mass extinction that wiped out dinosaurs. Freed from competition with the ...

This is a reconstruction of the prehistoric mammal Spinolestes in the Cretaceous-period Las Hoyas wetland. This image is not associated with the current study but demonstrates a dark-furred mammal ...

The teeth of rodents never stop growing. There are lots of mammals in the world and to help you identify them, there are two important things to know. The first thing is that all mammals have hair ...

Ancient mammals that lived in the time of dinosaurs were mostly the same dark-brown colour, according to a new study providing clues about how those mammals evolved as they faced giant predators.

Some of them resemble larger versions of their living relatives. The rise of mammals The earliest known mammals first appeared about 225 to 200 million years ago during the late Triassic period.