Alaska, largely unspoiled wilderness, looks like something out of The Lord of the Rings.

NASA's Landsat 8 satellite snapped a stunning top-down view of an "unusually spectacular" Mount Etna eruption. Infrared data makes the volcano's lava river really pop.

Today, we know of Mars as a cold, dry desert, with patches of subterranean ice and ice caps at its poles. Billions of years ...

Satellites have captured amazing views views of these craters on Earth. ESA explains. Nördlinger Ries Ouarkziz Crater ...