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.

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 ...

Putting together a giant jigsaw puzzle can be a lot of fun! Especially when the pieces are millions of years old. Jonah Choinière of the Evolutionary Studies Institute at the University of the ...

There are two things most young boys are immensely interested in: dinosaurs and their own penises. And, evidently, most males never completely lose their focus on those two objects of affection. This ...

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 ...

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 ...