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SOHO image: Here comes the sun

The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and die down repeatedly. Its Extreme ultraviolet Imaging Telescope has taken images ...

dateJul 13, 2015 in Space Exploration
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Photosynthesis has unique isotopic signature

Photosynthesis leaves behind a unique calling card, a chemical signature that is spelled out with stable oxygen isotopes, according to a new study in Science. The findings suggest that similar isotopic signatures could exist ...

dateApr 23, 2015 in Earth Sciences
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Radiation safety for sunken-ship archaeology

About 42 miles southwest of San Francisco and 2,600 feet underwater sits the U.S.S. Independence, a bombed-out relic from World War II. The aircraft carrier was a target ship in atomic weapon tests at Bikini Atoll in the ...

dateJul 08, 2015 in Environment
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