(Phys.org)—Some of the biggest black holes in the Universe may actually be even bigger than previously thought, according to a study using data from NASA's Chandra X-ray Observatory.
Astronomy
Dec 18, 2012
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When lightning strikes from a towering cumulonimbus cloud down to the ground, the electrical discharge can perturb the atmosphere's electric field, potentially triggering a second event-sprite discharge. This more elusive ...
Earth Sciences
Dec 18, 2012
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Samsung has overtaken Nokia as the top mobile phone brand for 2012 and has opened up a decisive lead over Apple in the smartphone market, a research firm said Tuesday.
Business
Dec 18, 2012
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The field of metamaterials involves augmenting materials with specially designed patterns, enabling those materials to manipulate electromagnetic waves and fields in previously impossible ways. Now, researchers from the University ...
General Physics
Dec 18, 2012
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As the search for dark matter intensifies, the Kavli Institute for Cosmological Physics at the University of Chicago and the National Academy of Sciences organized a colloquium that brings together cosmologists, particle ...
General Physics
Dec 18, 2012
153
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Researchers in the Department of Health Policy and Management at Columbia's Mailman School of Public Health assessed the impact of pollution on agricultural worker productivity using daily variations in ozone levels. Their ...
Economics & Business
Dec 18, 2012
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Instagram backed down Tuesday from a planned policy change that appeared to clear the way for the mobile photo sharing service to sell pictures without compensation, after users cried foul.
Internet
Dec 18, 2012
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US regulators Tuesday ordered data brokers to turn over information about how they collect and use information about consumers, in a move hailed by Internet privacy activists.
Internet
Dec 18, 2012
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(Phys.org)—Computer scientists at the University of California, San Diego have built a small fleet of portable pollution sensors that allow users to monitor air quality in real time on their smart phones. The sensors could ...
Engineering
Dec 18, 2012
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The Green Revolution has stagnated for key food crops in many regions of the world, according to a study published in the Dec. 18 issue of Nature Communications by scientists with the University of Minnesota's Institute on ...
Other
Dec 18, 2012
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