Cowboys and ranchers rely on their deep knowledge of the land to search for prehistoric dinosaur fossils – from T-Rex and Triceratops to discovering a rare and disputed dinosaur species.

In 1980, the U.S. government banned new human occupation in the Arctic National Wildlife Refuge in Alaska, a protected area, home to thousands of native animals and pristine terrain spanning roughly the size of South Carolina. Currently, only a handful of families spread across seven permitted cabins are allowed to remain in the refuge. Within less than 100 years, all remaining permits will reach expiration, and there will be no human presence left.