Site of half the world's active geysers and about the same size as Cyprus, Yellowstone National Park's scenery and wildlife make it one of the biggest draws for tourists in the US. But those famous ...

Why it's incredible: Evidence suggests it could be the greatest known impact crater on Earth. The Wilkes Land crater is a hole in the bedrock beneath East Antarctica's ice sheet measuring 315 miles ...

The world is facing a giant challenge in an attempt to close the Gates of Hell, but this decision needs to be thought through ...

The discovery of a vast, fresh impact scar on Mars began with what looked like a smudge in a routine weather snapshot. A ...

Danish and Swedish researchers have dated the enormous Hiawatha impact crater, a 31 km-wide meteorite crater buried under a kilometer of Greenlandic ice. The dating ends speculation that the meteorite ...

A buildup of methane and other fluids in open and closed "systems" in the permafrost could explain why strange, icy mounds sometimes erupt to form giant crater, researchers say. When you purchase ...

Scientists say an impact crater bigger than Washington, D.C. is hiding beneath more than a half-mile of ice in Greenland, NBC News reported. The crater, which would be the first ever discovered under ...

Material from the crater can "tell the story of the late evolution of the lunar magma ocean," scientists say. A giant impact crater on the moon may contain primordial pieces of the lunar mantle and ...