Gastroliths are “stomach stones or gizzard stones” found in the digestive tract of some prehistoric animals that do not chew their food. Dinosaur National Monument photo You might want to wash your ...

Dear Sundog: I’ve been obsessed with rocks since I was a kid. I’d walk riverbeds and shorelines with my head down, picking up everything that caught my eye and pocketing the ones that captured my ...

A mysterious shiny coating found on rocks in many of Earth’s arid environments could reveal whether there was once life on Mars, according to new research. The research, published in the July edition ...

You might want to wash your hands the next time you check out an unusually shiny rock. Turns out fossilized poop — called coprolites — isn’t the only disgusting thing dinosaurs left behind for modern ...