Before the asteroid hit, Steve described mammals as “staying and diversifying in the shadows” while dinosaurs “eventually took over from the crocodiles, got bigger and spread around the ...

A badger-like mammal was sinking its teeth into the ribs of a dinosaur three times its size when they were buried in volcanic ash 125 million years ago, capturing the pair in a deadly embrace.

The evolution of mammals has been marked by significant events, such as the mass extinction that wiped out non-avian ...

Dinosaurs long dominated Earth's land ecosystems with a multitude of forms including plant-eating giants like Argentinosaurus ...

This adds to evidence that mammals were more diverse during the age of dinosaurs than previously realised. The work is published by an international team of scientists in this week's Nature.

France’s varied geology makes it fertile ground for dinosaur fossil hunters, but many finds have only been unearthed in the ...

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.

In fact, many of the key features that make us mammals evolved even before the dinosaurs. Paleontologists have known for ...

By contrast, dinosaurs always held up their own weight.' African savanna elephants, Loxodonta africana, are the largest land animals alive today. Most weigh five to seven tonnes. The biggest ...

Faced with an evolving group of competing organisms -- the mammals -- perhaps dinosaurs were driven to extinction by competition. Packs of small mammals would have competed with dinosaurs for food.

Paleontologists found the fossilized skull in Yunnan Province’s Lufeng Dinosaur National Geopark in China. The group ...