Earth's valleys tell an ancient story of ice and power. Over millions of years, massive glaciers have carved, sculpted, and transformed the landscape in ways that still take researchers' breath away.

These objects are startlingly reminiscent of Star Trek’s Federation insignia — but they’re geological features inside a large crater on Mars. It’s a phenomenon, says NASA, that also explains why ...

When a bird flaps its wings it redistributes the air around it, leaving whirling eddies behind. Some gregarious species, such as the Canada goose, have learned to take full advantage of this upwardly ...

Scientists found an unexpected discovery on the surface of Mars: a formation resembling the face of a bear. A camera on NASA's Mars Reconnaissance Orbiter snapped a photo of the formation on Dec. 12.