A file photo from 2011 shows a man touching a giant bronze sculpture of a mammoth in the Siberian city of Khanty-Mansiysk. A team of Russian and South Korean scientists who found a well-preserved frozen woolly mammoth carcass this month say it also included blood. Natalia Kolesnikova/AFP/Getty Images hide caption

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Natalia Kolesnikova/AFP/Getty Images
Adam Cole/NPR

Gizmo Uses Lung Cells To Sniff Out Health Hazards In Urban Air

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Researchers Revive A Plant Frozen In Time

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Teacher Feature: Ethnobotanist Tom Carlson

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Bad Diagnosis For New Psychiatry 'Bible'

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With Chemical Tweaks, Cement Becomes A Semiconductor

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The SciFri Book Club Takes a Hike

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Radar images of asteroid 1998 QE2, taken when the cosmic traveler was about 3.75 million miles from Earth, revealed that the asteroid, with a 1.7-mile diameter, has a moon or satellite revolving around it. NASA/JPL-Caltech/GSSR hide caption

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NASA/JPL-Caltech/GSSR

Channel-billed toucans are important seed dispersers in rain forests. Courtesy of Lindolfo Souto/AAAS/Science hide caption

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Courtesy of Lindolfo Souto/AAAS/Science

Big-Mouthed Toucans Key To Forest Evolution

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Houston's Petrochemical Industry, Source Of Jobs And Smog

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Whenever a steer or cow leaves a farm in Michigan or goes to a slaughterhouse, it passes by a tag reader, and its ID number goes to a central computer that keeps track of every animal's location. Dan Charles/NPR hide caption

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Dan Charles/NPR

Michigan Tracks Cattle From Birth To Plate

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An evening view of the Exxon Mobil oil refinery complex in Baton Rouge, La. John W. Poole/NPR hide caption

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John W. Poole/NPR

Baton Rouge's Corroded, Overpolluting Neighbor: Exxon Mobil

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Headed To Mars? Watch Out For Cosmic Rays

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The metal in an Egyptian iron bead dating from around 3,300 BC has been found to have originated from space, according to analysis. Here, the bead is seen in (clockwise from top left) a photograph, a CT cross-section view, a model of nickel oxides, and a model in which blue areas represent the rich presence of nickel inside the bead. The Open University/University of Manchester hide caption

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The Open University/University of Manchester