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

At the quarries, on state and private land, fossil-hunters dig up and sell the preserved remains of fish, crocodiles, mammals and plants from that time. (Wyoming is one of the few states that issues ...

Just over three years ago, they were encased in rock in Wyoming quarries. "I'm utterly gobsmacked ... to become one of the most productive fossil sites in the world. The Children's Museum has ...

One is the Morrison, which was laid down when what is now North Wyoming was a forested ... will be keeping an eye on the quarries through the winter to ensure fossil thieves don't try to lift ...

The Quarry Trail (Q1, Q2) takes visitors through the bottom of ... Many of the rock layers contain fossils of these organisms. Fossils formed when an animal's shell or other hard structure is buried ...