Dinosaurs may have buddied up with other species of dinosaur for safety reasons, say scientists after unexpectedly spotting tracks that suggest different kinds may have once walked side by side.

Arizona's Petrified Forest National Park has done it again. The famed fossil-rich ground has provided paleontologists a ...

The color pattern on Anchiornis was so extravagant that the scientists are confident it served some visual function. “It was definitely for showing off,” Mr. Vinther said. Some features, like ...