Sponsor: COSI Everyone knows Tyrannosaurus rex—but did you know these fierce predators started life as fluffy, gangly hatchlings? Or that they evolved from a family of mostly small, fast ...

It would eventually become the ultimate apex predator of the Late Cretaceous period. But the tyrannosaurs that preceded it weren’t always at the top of the food chain—one of those myths about ...

Meet the Cryolophosaurus, the 21-foot predator with the shape and physique of a T-rex. But unlike the great T-rex which had ...

Improved technologies, such as biomechanical modeling and x-ray imaging, have allowed scientists to gain a deeper understanding of how this apex predator lived.

Some experts have argued that the lumbering T-rex could not run fast enough to be a skilful predator. Jack Horner, curator of palaeontology at the Museum of the Rockies in Bozeman, Montana ...

The museum just opened an exhibit devoted to the infamous dino, called "T. rex: The Ultimate Predator." The exhibit showcases the most up-to-date research on the prehistoric animal. And as it ...

Gabrielle Phifer checks out T. rex: The Ultimate Predator at COSI, where you can get up close with life-sized models, interactive exhibits, and cutting-edge reconstructions of this prehistoric giant.