Undersea volcanic activity triggered a mass extinction of marine life and buried a thick mat of organic matter on the sea floor about 93 million years ago, which became a major source of oil, according to a new study.

A lone granite boulder found against all odds high atop a glacier in Antarctica may provide additional key evidence to support a theory that parts of the southernmost continent once were connected to North America hundreds of millions of years ago.

The Wilkins Ice Shelf is experiencing further disintegration that is threatening the collapse of the ice bridge connecting the shelf to Charcot Island.

The May 12 earthquake that rocked Sichuan Province in China was the first there in recorded history and unexpected in its magnitude. Now a team of geoscientists is looking at the potential for future earthquakes due to earthquake-induced changes in stress.

Scientists have long anguished over how little is known about Mercury, the innermost of the four terrestrial planetary bodies in our solar system.

The first thing an alien race is likely to hear from Earth is chirps and whistles.

New research suggests that how often Old Faithful and other Yellowstone geysers erupt may depend on annual rainfall patterns.

A mud volcano which has caused millions of dollars worth of damage was caused by the drilling of a gas exploration well, an international team of scientists has concluded.

In the middle of the fourth century AD, a series of earthquakes struck the port of Kourion on the southern coast of Cyprus. The town had no doubt experienced its share of seismic events, but nothing prepared its inhabitants for the major earthquake and tsunami that struck just after dawn, most likely on July 21, AD 365.

When archaeologists excavated the site, among the many discoveries was the heartbreaking tableau of a skeletal family. The man holds his wife protectively while she cradles their one-year-old child. The image, both poignant and instructive, graces the cover of Stanford University Earth Science and geophysics professor Amos Nur's new book, Apocalypse: Earthquakes, Archaeology, and the Wrath of God, written with the assistance of his graduate student Dawn Burgess.

A new model simulation of Atlantic hurricane activity for the last two decades of this century projects fewer hurricanes overall, but a slight increase in intensity for hurricanes that do occur. Hurricanes are also projected to have more intense rainfall, on average, in the future. The findings are reported in a study by scientists at NOAA's Geophysical Fluid Dynamics Laboratory in Princeton, N.J.