NASA is taking its newest Mars exploration technologies out of the lab and into Earth's most brutal deserts, pushing drones, ...

Did you know that a desert doesn't have to be hot or sandy? In fact, many of the world's harshest deserts are freezing cold.

This intriguing astronaut photo shows a trio of ancient "black mesas", which sit side-by-side in the Sahara desert. The dark structures have enabled a series of rare sand dunes to form around them ...