Until now, estimating how old a dinosaur was when it died has been a fairly simple process — just count up the growth rings in its fossilized bones. "We always thought that those rings were formed ...

In biology and paleontology (the study of extinct organisms) there are a few ways to estimate the age of an animal's skeleton ...

Add Yahoo as a preferred source to see more of our stories on Google. A rare fossil of Joaquinraptor casali from Patagonia reveals a powerful predator that may have dined on crocodiles. (CREDIT: The ...

Scientists discovered a crocodile relative that is 200 million years old and had two legs. The diversity of reptiles during the Triassic period is shown by this discovery, which is long before ...