A cast of a T. rex skeleton on display outside the UC Museum of Paleontology at the University of California, Berkeley. The original, a nearly complete skeleton excavated in 1990 from the badlands of ...

How many Tyrannosaurus rexes roamed North America during the Cretaceous period? That’s a question Charles Marshall pestered his paleontologist colleagues with for years until he finally teamed up with ...

At the high end, it's probably less than half the total number of humans that have ever lived. But it doesn't take many to be terrifying. Eric Mack has been a CNET contributor since 2011. Eric and his ...

BILLIONS of T-Rexes roamed the earth, new research has shown. The giant meat-eating dinosaur – made famous in Jurassic Park – dominated the world during the Cretaceous period. Now scientists have ...

Add Yahoo as a preferred source to see more of our stories on Google. When John Hammond first brought his dream of a theme park filled with living dinosaurs to fruition in the first Jurassic Park, he ...

A T. rex wasn’t as fast as “Jurassic Park” made it out to be. In fact, recent research shows that Jeff Goldblum and crew could have simply walked away from the dinosaur instead of being all dramatic ...

The king of the dinosaurs took 20 years to reach its full potential. As the T. rex grew from a hatchling to a full adult, it gained a whopping 9 to 10 tons. According to a study published today in the ...

An estimation of the iconic predator’s total population can teach us things about dinosaurs that fossils cannot. By Kenneth Chang Before they were killed off by a meteor that hit Earth 66 million ...

With fossils few and far between, paleontologists have shied away from estimating the size of extinct populations. But scientists decided to try, focusing on the North American predator T. rex. Using ...

A cast of a T. rex skeleton on display outside the UC Museum of Paleontology at the University of California, Berkeley. Credit: Keegan Houser, UC Berkeley Tyrannosaurus rex is probably one of the most ...