Newly discoveredfossilized footprints in Mongolia reveal that some dinosaurs could run at speeds rivaling top cyclists. This ...

About 150 million years ago, the land that is now the western United States was alive with dinosaurs. New research shows that the smallest members of the biggest dinosaurs played a huge role in ...

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