Meet the mighty T-Rex, the king of the Cretaceous period! This behemoth of a beast roamed the land during the late Cretaceous, around 65 million years ago.
The Velociraptor, or "run-fast-raptor", was a swift and deadly hunter that stalked its prey in what is now modern-day Mongolia. Its sharp claws and agile body made it a force to be reckoned with.
Read about the time-traveler's encounter with a Velociraptor
The Pteranodon was a flying giant that soared the skies, its wingspan reaching up to 10 meters. Its fish-eating habits made it a key component of the Cretaceous ecosystem.
See the Pteranodon's flight pattern animation
The Spinosaurus was a sail-backed fisherman of the Cretaceous period. Its long, slender jaws made it a formidable hunter of fish and other aquatic prey.