A tour guide in the United Kingdom was confronted with something both rare and fantastical when he stumbled upon a 3-foot-long purple footprint pressed in coastal clay, a photo shows. It was clearly a ...

Under-sea mountains are key locations for predators -- with 41 times more sharks than the open ocean, new research shows.

The short-tailed find with the forelimb of a raptor is an extremely rare example of the transition from dinosaurs to birds ...