Despite what's depicted in movies and books, the real Tyrannosaurus rex was likely an awkward swimmer at best. To date, no one has found swim traces from a tyrannosaur. Paleontologists have found some ...

But millions of years ago, these badlands, in what’s now northern New Mexico, were a coastal swamp in an inland sea, alive with large trees, reptiles, primitive mammals, and meat-chomping dinosaurs.

For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...