Paleontologists in Denmark found a once-gloopy, now-hardened mess that they believe was spat up by a Cretaceous-era fish.

Scientists have made a breakthrough in understanding how the dinosaurs rose to power — by studying dino puke and poop. The findings, published Nov. 27 in the journal Nature, offer new insights ...

A chicken-sized dino, the oldest known in North America, has thrown a wrench in the widely accepted timeline of early dinosaur history.