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. Monument staff work on excavated dinosaur fossils in the Quarry Exhibit Hall Parking Lot. Located on the Colorado-Utah border at ...

Dinosaurs liked it rough — and the fossils they left behind prove it. Top paleontologists have discovered that mating between some species of prehistoric behemoths was so violent that they literally ...

Add Yahoo as a preferred source to see more of our stories on Google. Artist’s rendering of a Tyrannosaurus rex. (ROGER HARRIS/SPL/Getty Images) Dinosaur bones are like trees—every year is represented ...

Getting your Trinity Audio player ready... Parking lot construction at Colorado’s Dinosaur National Monument unearthed new fossils last fall, the first discovery at the monument in more than 100 years ...

A newly identified tiny dinosaur, Foskeia pelendonum, is shaking up long-held ideas about how plant-eating dinosaurs evolved.

A group of researchers has estimated how long it took tyrannosaurus rex to reach its full size — and the time period is significantly longer than scientists previously believed. The dinosaur is ...

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