Ancient tree rings show links between climate change and major events in human history, like migrations, plagues and the rise and fall of empires, said a study this week in the journal Science.
Earth Sciences
Jan 14, 2011
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For more than a decade, Dr. Joseph Ortiz, associate professor of geology at Kent State University and part of an international team of National Science Foundation (NSF)-funded researchers, has been studying long-term climate ...
Earth Sciences
Dec 2, 2010
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Earth has done an ecological about-face: Global plant productivity that once flourished under warming temperatures and a lengthened growing season is now on the decline, struck by the stress of drought.
Earth Sciences
Aug 19, 2010
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The most robust statistical examination to date of our species' genetic links to "mitochondrial Eve" -- the maternal ancestor of all living humans -- confirms that she lived about 200,000 years ago. The Rice University study ...
Evolution
Aug 17, 2010
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When it comes to early reading, a bad teacher can prevent children from reaching their full potential.
Social Sciences
Apr 22, 2010
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(PhysOrg.com) -- Astronomers have their eyes on a hot group of young stars, watching their every move like the paparazzi. A new infrared image from NASA's Spitzer Space Telescope shows the bustling star-making colony of the ...
Astronomy
Apr 1, 2010
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(PhysOrg.com) -- Modern astronomy sometimes makes discoveries by looking in new places, the distant universe for example, using telescopes and instruments that extend the previous limits of detection.
Astronomy
Feb 26, 2010
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A journey from Earth to Mars could in the future take just 39 days -- cutting current travel time nearly six times -- according to a rocket scientist who has the ear of the US space agency.
Space Exploration
Feb 26, 2010
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(PhysOrg.com) -- Many, perhaps even most stars, are members of binaries -- two stars that orbit each other. Symbiotic stars are a small subset of binaries with an attitude: they display characteristic, dramatic, episodic ...
Astronomy
Feb 22, 2010
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(PhysOrg.com) -- An imager aboard a NASA satellite launched into Earth's orbit Thursday will photograph the sun's changing atmosphere and magnetic fields -- lending unprecedented insights into the dynamics of solar activity.
Space Exploration
Feb 12, 2010
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