Researchers at the U.S. Geological Survey National Wildlife Health Center in Madison, Wis., use eggs to see if the Asian strain of the H5N1 bird flu virus has entered the U.S. in this photo from 2006. Andy Manis/AP hide caption

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Research Moratoriums And Recipes For Superbugs: Bird Flu In 2012
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Why Charities Need To Consider Donors' Politics
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Making Resolutions That Stick
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Get The Most Bang From Your Bubbly
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Researchers in Australia found that when they removed mistletoe from large sections of forests, vast numbers of birds left. BSIP/UIG via Getty Images hide caption

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Birds Hang Around Mistletoe For More Than A Kiss
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Brain scans using Amyvid dye to highlight beta-amyloid plaques in the brain. Clockwise from top left: a cognitively normal subject; an amyloid-positive patient with Alzheimer's disease; a patient with mild cognitive impairment who progressed to dementia during a study; and a patient with mild cognitive impairment. Slide courtesy of the journal Neurology hide caption

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Despite Uneven Results, Alzheimer's Research Suggests A Path For Treatment
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Stem Cells Treat Lou Gehrig's Disease, In Mice
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Could Life Exist on Newfound Alien Planet?
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Future Fibers May Be Spun From Slime
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Why Some Kids Have An Inflated Sense Of Their Science Skills
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A section of the Sutter's Mill meteorite, dubbed "Darth Vader," is studied at a lab at the University of California, Davis. The meteorite is made of carbonaceous chondrite, which contains materials that formed the planets of the solar system. UC Davis hide caption

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In Calif. Gold Country, A Rush That's Out Of This World
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Bali sea salt and a spoonful of Hawaiian red alae salt. Jim Noelker/AP hide caption

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The Paradox And Mystery Of Our Taste For Salt
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Chimpanzees check out a termite mound at the Chimp Haven sanctuary in Louisiana. Chimp Haven hide caption

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For centuries, Russians believed putting a brown frog in their milk would keep it fresh. Now scientists are finding chemicals in the frog's slimy goo that inhibit the growth of bacteria and fungi. Stefan Arendt/Corbis hide caption

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