Dillon Perry made the discovery of the mystery rock while hunting for agates along the Yellowstone River near Greycliff.

Perry made the discovery of the mystery rock while hunting for agates along the Yellowstone River near Greycliff.

Jelly Roll, who recently revealed that he’s lost nearly 200 pounds, shared the overall goal he’s aiming to hit in his weight loss journey.

Kenneth Sims and other research scientists recently discovered that mafic volcanism of Henrys Fork Caldera -- located in ...