We know the main reason that the age of the dinosaurs came to an end: an asteroid impact on the Yucatán Peninsula some 66 million years ago. But how the dinosaurs’ reign began is far less clear—and ...

The catastrophic impact of an asteroid 66 million years ago brought death and devastation on Earth—but also fascinating new life.

Two leading US aerospace companies, GE Aerospace and Lockheed Martin, are joining forces to create a rotating detonation ramjet engine (RDDJ). Despite a number of advantages of RDDJs—for example, the ...

Residents of the San Xavier District in the Tohono O'odham Nation now can visit their dentist at a new state-of-the art clinic on the reservation just southwest of Tucson. "It's a big deal. It's going ...

A 45-year-old tourist from Holland painfully found out just how wild the Sonoran Desert can be — even in the confines of a museum. Arizona-Sonora Desert Museum officials made the "extremely rare" ...

OLD FORT, N.C. — Morning mist is still burning off the surrounding mountains when they appear: Small groups of helmeted riders on one-wheeled, skateboard-like contraptions, navigating the pitched ...