Mystery Of The Bdelloid Dry Spell Solved

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The bdelloid rotifer Philodina gregaria. Bdelloid rotifers are tiny invertebrates that reproduce asexually. Courtesy of Micrographia hide caption

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Courtesy of Micrographia

Listen To Segment: A Long Dry Spell

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Water in the atmosphere traps heat, like glass in a greenhouse. When there's less water vapor in the atmosphere, less heat is trapped. Space Frontiers/Getty Images hide caption

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Space Frontiers/Getty Images

Atmospheric Dry Spell Eases Global Warming

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A barefooted runner takes to the streets. Charlie Riedel/AP hide caption

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Charlie Riedel/AP

Study: Humans Were Born To Run Barefoot

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An artist's rendition of two Sinosauropteryx dinosaurs, showing their short, bristle-like feathers along the midline of the head, neck, back and around the tail, forming irregular stripes. Chuang Zhao and Lida Xing hide caption

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Chuang Zhao and Lida Xing

Listen Discovering Dinosaur Color From Fossilized Feathers

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Methane Causes Vicious Cycle In Global Warming

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Tools like these ax heads from Vinelz, Switzerland, were used by Neolithic farmers and may have been part of their sex appeal to hunter-gatherer women. Sandstein via Wikimedia hide caption

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Sandstein via Wikimedia

For Cave Women, Farmers Had Extra Sex Appeal

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The red specks highlight where the integrity of the brain's white matter is significantly less in the teens who binge drink, compared to those who do not. Courtesy of Susan Tapert/Tim McQueeny/UCSD hide caption

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Courtesy of Susan Tapert/Tim McQueeny/UCSD

Teen Drinking May Cause Irreversible Brain Damage

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Smog shrouds the Los Angeles skyline. New ozone standards from the EPA aim to reduce smog, but may actually increase global warming. David McNew/Getty Images hide caption

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David McNew/Getty Images

New Anti-Smog Restrictions Could Warm Planet

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Scientists Grow Working Neurons From Stem Cells

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Researchers dyed sperm from each deer mouse a different color; in this case, red represents one male and green another. The sperm joined together with their own kind, as seen here, allowing them to swim faster than those that did not cluster together. Heidi Fisher hide caption

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Heidi Fisher

Sperm Of A Feather Flock Together

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MS Patients May Soon Bypass Painful Injections

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Study: We Need More Than Wii Workouts

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Scientists: Male Chromosome Is Still Evolving

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This decorative shell ornament, attributed to Neanderthals, shows signs of being painted with orange pigment. It's one of several examples of ornamentation that researchers have found in Spain, at sites that were used by Neanderthals as far back as 50,000 years ago. Courtesy of Joao Zilhao hide caption

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Courtesy of Joao Zilhao

Study: Neanderthals Wore Jewelry And Makeup

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