Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

They have since shifted their argument to the claim that if Dinosaur National Monument is ... is the highly emotional issue of public v. private power that hampers reasonable discussion of power ...

The early dinosaurs all exhibited particularly fast growth, but they weren't alone in this, as similar growth rates were seen in several of the non-dinosaur reptiles as well.

According to scientists who maintain that dinosaur extinction came quickly, the impact must have spelled the cataclysmic end. For months, scientists conclude, dense clouds of dust blocked the sun ...