News tagged with ancient oceans
Mars Express radar gives strong evidence for former Mars ocean
(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 ...
Space & Earth / Space Exploration
Feb 07, 2012 |
4.3 / 5 (7) |
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Poisonous oceans delayed animal evolution
Animals require oxygen, but oxygenated environments were rare on early Earth. New research from University of Southern Denmark shows that poisonous sulfide existed in the oceans 750 million years ago making ...
Space & Earth / Earth Sciences
Oct 24, 2011 |
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Research group finds ancient deep sea mud volcano as possible site for origin of life
(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 ...
Space & Earth / Earth Sciences
Oct 18, 2011 |
4.4 / 5 (5) |
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New technique unlocks secrets of ancient ocean
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 ...
Space & Earth / Earth Sciences
Oct 11, 2011 |
4.8 / 5 (10) |
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Reservoirs of ancient lava shaped Earth
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 ...
Space & Earth / Earth Sciences
Jul 27, 2011 |
4.7 / 5 (6) |
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Bahamas bans shark fishing
The Bahamas on Tuesday announced a ban on shark fishing, becoming the latest country to protect the ancient sea predator which is considered at risk due to demand for its fins in Chinese cuisine.
Jul 05, 2011 |
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New map reveals giant fjords beneath East Antarctic ice sheet
Scientists from the U.S., U.K. and Australia have used ice-penetrating radar to create the first high- resolution topographic map of one of the last uncharted regions of Earth, the Aurora Subglacial Basin, ...
Space & Earth / Earth Sciences
Jun 01, 2011 |
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Plankton key to origin of Earth's first breathable atmosphere
Researchers studying the origin of Earth's first breathable atmosphere have zeroed in on the major role played by some very unassuming creatures: plankton.
Space & Earth / Earth Sciences
Feb 21, 2011 |
4 / 5 (5) |
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Relationship found between ancient climate change and mass extinction
(PhysOrg.com) -- In the Late Ordovician Period of Earth's geologic history, about 450 million years ago, more than 75 percent of marine species perished and Earth scientists have been seeking to discover what ...
Space & Earth / Earth Sciences
Feb 18, 2011 |
3.3 / 5 (3) |
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Oxygen-free early oceans likely delayed rise of life on planet
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 ...
Space & Earth / Earth Sciences
Jan 10, 2011 |
5 / 5 (3) |
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New study indicates an ancient ocean may have covered one-third of Mars
A vast ocean likely covered one-third of the surface of Mars some 3.5 billion years ago, according to a new study conducted by University of Colorado at Boulder scientists.
Space & Earth / Earth Sciences
Jun 13, 2010 |
4.8 / 5 (26) |
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Geologists Study Historic Patterns of Climate Change
(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 ...
Space & Earth / Earth Sciences
Apr 30, 2010 |
3.8 / 5 (12) |
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Scientists link ocean acidification to prehistoric mass extinction
(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 ...
Space & Earth / Earth Sciences
Apr 27, 2010 |
4.5 / 5 (13) |
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Early Earth absorbed more sunlight -- no extreme greenhouse needed to keep water wet
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 ...
Space & Earth / Earth Sciences
Apr 06, 2010 |
4.8 / 5 (12) |
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New picture of ancient ocean chemistry argues for chemically layered water
A research team led by biogeochemists at the University of California, Riverside has developed a detailed and dynamic three-dimensional model of Earth's early ocean chemistry that can significantly advance ...
Space & Earth / Earth Sciences
Feb 11, 2010 |
5 / 5 (3) |
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