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Rewriting General Relativity? Putting A New Model Of Quantum Gravity Under The Microscope |
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Written by Steve Daly
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Wednesday, 26 August 2009 |
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(Credit: Image copyright American Physical Society / Illustration: Carin Cain) ScienceDaily (Aug. 26, 2009) — Does an exciting but controversial new model of quantum gravity reproduce Einstein's theory of general relativity? Scientists at Texas A&M University in the US explore this question in a paper appearing in Physical Review Letters and highlighted with a Viewpoint in the August 24th issue of Physics. "If it ain't broke, don't fix it," sums up fairly well how many scientists have viewed Einstein's theory of general relativity. The theory, which Einstein developed in the early 20th century, says that matter curves spacetime, and it is this curvature which deflects massive bodies – an effect that we interpret as the influence of gravity. The theory has been tested to extremely high accuracy and without it, our satellite global positioning system would be off by about 10 km per day. |
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Thunderstorms Scrub Discovery Launch |
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Written by Steve Daly
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Tuesday, 25 August 2009 |
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25 August 2009 1:25 a.m. EDT Lightning-producing thunderstorms near Florida's Kennedy Space Center did not clear the area in time, forcing a scrub of tonight's planned launch of space shuttle Discovery. NASA will likely try again to launch Discovery in the pre-dawn hours of Wednesday morning (August 26) … more details to follow. Click here for SPACE.com’s launch preview for Discovery’s mission. -- Roger Guillemette NASA is broadcasting Discovery’s STS-128 mission to the International Space Station live on NASA TV. Click here for SPACE.com’s NASA TV feed or follow the NASA TV link at the upper left on this page. |
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Last Updated ( Tuesday, 25 August 2009 )
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New Species Of Crustacean Discovered Near Canary Islands |
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Written by Steve Daly
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Tuesday, 25 August 2009 |
 ScienceDaily (Aug. 25, 2009) — During a cave diving expedition to explore the Tunnel de la Atlantida, the world's longest submarine lava tube on Lanzarote in the Canary Islands, a team of scientists and cave divers have discovered a previously unknown species of crustacean, belonging to the remipede genus Speleonectes. They gracefully swim through the complete darkness of submarine caves, constantly on the lookout for prey. Instead of eyes, predatory crustaceans of the class Remipedia rely on long antennae which search the lightless void in all directions. Like some type of science fiction monster, their head is equipped with powerful prehensile limbs and poisonous fangs.
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