(PhysOrg.com) -- ESA's Mars Express has returned strong evidence for an ocean once covering part of Mars. Using radar, it has detected sediments reminiscent of an ocean floor within the boundaries of previously identified, ...
Space Exploration
Feb 7, 2012
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(PhysOrg.com) -- An international consortium of scientists and researchers has been studying some ancient rocks found on the southwestern coast of Greenland. They believe the rocks were once part of a deep sea mud volcano, ...
Earth's largest mass extinction event, the end-Permian mass extinction, occurred some 252 million years ago. An estimated 90 percent of Earth's marine life was eradicated. To better understand the cause of this "mother of ...
Earth Sciences
Oct 11, 2011
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Geological history has periodically featured giant lava eruptions that coat large swaths of land or ocean floor with basaltic lava, which hardens into rock formations called flood basalt. New research from Matthew Jackson ...
Earth Sciences
Jul 27, 2011
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Researchers studying the origin of Earth's first breathable atmosphere have zeroed in on the major role played by some very unassuming creatures: plankton.
Earth Sciences
Feb 21, 2011
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Geologists at the University of California, Riverside have found chemical evidence in 2.6-billion-year-old rocks that indicates that Earth's ancient oceans were oxygen-free and, surprisingly, contained abundant hydrogen sulfide ...
Earth Sciences
Jan 10, 2011
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(PhysOrg.com) -- University of Cincinnati geologist Tom Lowell is part of a team studying the effects of melting ancient glaciers. The research has implications for global warming, as published this week in Science Express.
Earth Sciences
Apr 30, 2010
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(PhysOrg.com) -- New evidence gleaned by analyzing calcium embedded in Chinese limestone suggests that volcanoes, which spewed massive amounts of carbon dioxide into the atmosphere for a million years, caused the biggest ...
Earth Sciences
Apr 27, 2010
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Four billion years ago, our then stripling sun radiated only 70 to 75 percent as much energy as it does today. Other things on Earth being equal, with so little energy reaching the planet's surface, all water on the planet ...
Earth Sciences
Apr 6, 2010
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The chemical composition of our oceans is not constant but has varied significantly over geological time. In a study published this week in Science, researchers describe a novel method for reconstructing past ocean chemistry ...
Earth Sciences
Feb 5, 2010
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