There were three of them, one of them probably a child, and at least one met a gruesome end at the hands of a terrifying predator.
About 67 million years later, a Wyoming rancher led scientists to their remains. Now experts are digging out one of the most complete skeletons yet of a Triceratops, the three-horned, plant-eating dinosaur that was one of the last of the giant reptiles.
"There's only three other skeletons that will match the completeness of one of the specimens we're excavating right now," said paleontologist Peter Larson, president of the Black Hills Institute of Geological Research.
Cameras captured the sight, sound and aftermath of the tiny asteroid exploding over Russia. CNN's Jim Boulden reports.
Physicist and cosmologist Lawrence Krauss explains the science behind the meteor that exploded over Russia and the asteroid that was approaching earth on Friday.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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