Half A Century Later, A Return To Challenger Deep

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Policy On High-Risk Biological Research Tightened

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This image shows the grid structure of the major pathways of the brain. It was created using a scanner that's part of the Human Connectome Project, a five-year effort which is studying and mapping the human brain. MGH-UCLA Human Connectome Project hide caption

toggle caption MGH-UCLA Human Connectome Project

How Your Brain Is Like Manhattan

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Researchers have analyzed the fossil imprints of of raindrops, like the ones shown here, to study the atmosphere of the Earth, as it was 2.7 billion years ago. The rule at the top is 5 centimeters, or about 2 inches, long. W. Alterman/University of Pretoria hide caption

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Raindrops In Rock: Clues To A Perplexing Paradox

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Pinon pine trees like this one dominate Rattlesnake Canyon. Jeff Mitton hide caption

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Pipe Down! That Noise Might Affect Your Plants

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Archaeologists Revisit Iraq

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Alan Alda Asks Scientists "What Is A Flame?"

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Weighing The Pros And Cons Of Aspirin Regimens

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President Obama signs the Affordable Care Act in the East Room of the White House on March 23, 2010. Data suggest that racial attitudes of ordinary Americans shape both how they feel about the health care overhaul and how intense those feelings are. Chip Somodevilla/Getty Images hide caption

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How Do Racial Attitudes Affect Opinions About The Health Care Overhaul?

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Domesticated Foxes: Man's New Best Friend?

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