Scientists, including Ken Caldeira of the Carnegie Institution's Department of Global Ecology, have found that the Earth's global warming, 55 million years ago, may have resulted from the climate's high sensitivity to a long-term release of carbon.

Alexandria, VA - The California State Mining and Geology Board has recognized the American Geological Institute (AGI) for its role in promoting earth science education and outreach in the state of California.

Volcanic explosivity is excited by gas bubbles in magma conduits; if sufficient amounts of gas are lost during magma ascent, the probability of an explosive eruption is reduced.

Tectonic processes such as faulting and load-induced flexure of the lithosphere [Earth's crust and uppermost mantle] have played a substantial role in lowering the land surface in the Gulf of Mexico basin over geologic time.

Scientists are finding an older, craggier face of Mars buried beneath the surface, thanks to pioneering sounding radar co-sponsored by NASA aboard the European Space Agency's Mars Express spacecraft.

Global warming 55 million years ago suggests a high climate sensitivity to carbon dioxide, according to research led by Mark Pagani, associate professor of geology and geophysics at Yale and published in the December 8 issue of Science.

NASA's announcement yesterday of evidence that water still flows on Mars, at least in brief spurts, demonstrates that the view of Mars as a very dry planet should be reevaluated, says Dawn Sumner, professor of geology at UC Davis. Recent work from by Sumner and graduate student Greg Chavdarian also supports the presence of liquid water near the surface.