Today's Top News
Two Evils Compete: Global Warming vs. Ozone Hole
Continuous sulfur injections would deplete polar ozone, delay ozone hole recovery.
Top Features
Gooey Origin of Human Placenta Revealed Read More
Why You Make the Same Mistake Twice Read More
How the Magna Carta Changed the World Read More
Earliest Oil Paintings Discovered Read More
Video
Pulsars: Death and Rebirth
VIDEO: Bagged Blood Danger
Image of the Day
Monkey Exposed to Unknown Poxvirus Red colobus monkeys living in a park in western Uganda harbored antibodies to an unknown orthopoxvirus.
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Trivia & Quizzes
Quiz: America in 1915 America's population in October 2006 will hit 300 million, becoming triple what it was in 1915. Quiz your self on how we got here, and how we got around, back then.--Heather Whipps
Shark Jobs: Nature's Dirty Work They might all look like troublemakers, but most sharks have a grander purpose�or at least a useful one�beyond scaring surfers. Some eat gross things or serve as ferries to total suckers. Others unwillingly serve humans for various questionable remedies. We quiz you on the dirty work done by sharks deep beneath, and sometimes above, our oceans. --Heather Whipps
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