WASHINGTON (Reuters) - One of the traits that helped make the dinosaurs such an evolutionary success story - thriving for 165 million years - was their fast growth rate, from massive meat-eaters like ...

Until now, estimating how old a dinosaur was when it died has been a fairly simple process: Count up the growth rings in the ...

Add Yahoo as a preferred source to see more of our stories on Google. FILE PHOTO: The skeleton of a Tyrannosaurus rex, the large meat-eating dinosaur that lived in western North America WASHINGTON ...

New research using fossil bone analysis is overturning traditional scientific views on the growth and lifespan of ...

The largest study ever conducted on the growth of Tyrannosaurus rex reveals that the dinosaur took a far longer and slower route to adulthood than scientists had previously believed.

New fossil find reveals a miniature dinosaur species once mistaken for a juvenile, offering fresh clues about early ...

Tyrannosaurus rex lived longer and took more time to reach its maximum size than previously thought, according to a new study.Scientists have long counted annual growth rings in fossilized ...

WASHINGTON, Feb 23 (Reuters) - The dinosaur group called theropods included the largest land meat-eaters ever on Earth - up to the size of a school bus. But there also were theropods the size of a ...