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Observations
NASA-funded monkey-radiation experiment raises hackles
A nonprofit group that promotes animal rights in medical research has taken issue with a NASA grant funding an assessment of the long-term effects of radiation on monkeys. The Physicians Committee for Responsible Medicine (PCRM), based in Washington, D.C., sent an appeal Thursday to NASA administrator Charles Bolden, urging that the radiobiology study, intended to test the effects of radiation encountered in long-range spaceflight, be suspended.
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Modifications to the theory of gravity could account for observational discrepancies, but not without introducing other complications -
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Mars rover plans its escape
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Stellar deal: NASA awards $2 million to X PRIZE winners for helping develop a lunar lander
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An intergalactic race in space and time
Weather, stray cargo ship and stuck cover conspire to postpone NASA's Ares 1-X test launch
Dark energy rips cosmos and agencies
US physicists propose astrophysics goals
What Galileo and Scientific American have in common: Honored Italian heritage
Emission Impossible?: Is Dark Matter Behind the Hazy Radiation at the Milky Way's Center?
NASA-funded monkey-radiation experiment raises hackles
Tweak Gravity: What If There Is No Dark Matter?
How Noise Can Help Quantum Entanglement
Stellar deal: NASA awards $2 million to X PRIZE winners for helping develop a lunar lander
Sundance Channel Presents: Green Porno [Video]
The Long-Lost Siblings of the Sun
17th-century Brueghel paintings trace the early, mysterious history of the telescope
NASA's mission to bomb the Moon
Fungus Makes Zombie Ants Do All the Work
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Tweak Gravity: What If There Is No Dark Matter?
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Powering a Green Planet: Sustainable Energy, Made InteractiveThe Web-only article below is a special rich-media presentation of the feature, "A Path to Sustainable Energy by 2030", which appears in the November 2009 issue of Scientific American. It was created by FlypMedia.com. Use the arrow in the lower corner to navigate
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