Seismologists have proven that the Hayward and Calaveras faults are essentially the same system, meaning that a rupture on one could trigger a rupture on the other, producing considerably larger quakes than once thought.

Tracks by swimming reptiles benefited from delayed ecologic recovery during the Early Triassic.

Studies of geysers in Chile and Yellowstone National Park reveal why geysers erupt periodically: the loops and bends in their plumbing.

How? Volcanoes cool the atmosphere because of the sulfur dioxide that is expelled during eruptions.

Academic studies from the University of California were among the most talked about research in online and popular media.

A fossilized amphibious ichthyosaur — bearing both flippers and flexible wrists, descended from terrestrial creatures — has been discovered in China.

Earth's last magnetic reversal took place 786,000 years ago and happened very quickly, in less than 100 years.

Mysteries of the deep come alive as satellite data bring thousands of uncharted sea mountains and new clues about deep ocean structures into focus.

Sierra Nevada freshwater runoff could drop 26 percent by 2100, caused by increased plant growth at higher elevations.

The western U.S. is rising — literally — as water dwindles away. Scientists are using GPS technology to track the uplift from massive loss of water, estimated at 62 trillion gallons.

Sediment cores collected in 1960s for doctoral thesis have attracted renewed scrutiny for clues to Cascadia earthquakes.

We love to see giant dinosaur fossils in museums, but microfossils are everywhere, geoscientist Lisa White tells school kids. An African-American woman in one of the least diverse scientific fields, White directs education and public programs at the Museum of Paleontology.