A geyser sprays water vapor from the surface of Saturn's moon Enceladus

We've known for some time that geysers on Saturn's moon Enceladus sprays water vapor that eventually finds its way to Saturn. But this striking image lets us see that water vapor spilling into space. » 9/16/12 11:00am 9/16/12 11:00am

The Real Reason You Hate the Smell of Sulfur

If you've ever visited Old Faithful and the other geysers at Yellowstone National Park, you've likely come away with two reactions. First, it's one of the most captivating sights in all of nature. Second, the place stinks like rotting eggs. » 2/06/12 5:00pm 2/06/12 5:00pm

Saturn's moon Enceladus is the perfect extraterrestrial ski resort

If you're tired of skiing on Earth, there's some perfect powder waiting for you, just 800 billion miles away. It's all thanks to Enceladus's amazing water geysers, some of which rain back down on the moon's surface as snow. » 10/04/11 11:44am 10/04/11 11:44am

Yellowstone Due for Eruption that Could Obliterate North America

Dozens of nearly-imperceptible mini-earthquakes have made Yellowstone National Park tremble over the past few days - they might be early warning of an eruption so huge it buries half the U.S. under hot ash. » 1/02/09 4:51pm 1/02/09 4:51pm