Step into Arizona’s ancient past and see the actual footprints left by prehistoric giants in this remote, awe-inspiring ...

Last fall, a routine day of rockhounding on Bureau of Land Management–managed public land in southwest Wyoming turned into an ...

Last fall, a routine day of rockhounding on Bureau of Land Management-managed public land in southwest Wyoming turned into an ...

An ancient DNA analysis of a 5,500-year-old human skeleton reveals that an ancestor of the bacterium that causes syphilis was ...

We’ve been lucky to uncover countless dinosaur footprints over centuries of exploration, some of which represent the largest dinosaur trackways known to science. Remarkable to think, then, that they ...