Baby dinosaur's running footprints discovered

Discovery may prove young sauropods could run on hind legs

A baby dinosaur approximately the size of a pug dog scurried alongside what may have been its mom or dad 148 million years ago in what is now foothills near Denver, scientists reported Monday at the annual meeting of the Geological Society of America in Denver.

They caught the paleo-action in the footprints left behind there near the town of Morrison, Colo. The scientists think the dinosaur prints, a set of infant prints next to partial prints from an adult, belonged to Apatosaurus, a sauropod — giant, long-necked dinosaurs that preferred veggies — and once known as Brontosaurus.

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