A series of fossilized footprints linked to a Triassic-era reptile have been stolen from a Utah national park. The incident is being investigated as an act of vandalism and the theft of “irreplaceable ...

News Brief: “Jurassic Park” may be all the rage this summer, but a research team led by the University of Washington’s Christian Sidor is kicking it up a notch with a batch of 13 studies focusing on ...

Millions of years before the arrival of the mighty Tyrannosaurus rex, another fearsome dinosaur -- the Gnathovorax -- roamed what is now southern Brazil, ripping apart its prey with sharp teeth.

PHOENIX — A Triassic reptile species discovered at Petrified Forest National Park in Arizona was named after a former park superintendent and his wife in the peer-reviewed scientific article that ...

Some ancient tracks in Capitol Reef National Park were “impressed into a muddy matrix and later filled in with a fine sand,” the National Park Service says. It's not clear if these were the stolen ...