Scientists in Hungary and Sweden say they've found an answer to the age-old question of how the zebra got its stripes. It turns out the pattern may have evolved to repel Africa's biting flies. The researchers discovered this by placing models of patterned zebras next to models of their plainer cousins, horses, and measuring how many flies ended up on each one. Host Scott Simon has more.
For sale: 160 acres of rolling hills in California perfect for a vineyard, cattle ranch or communication with outer space. The Jamesburg Earth Station and its 10-story satellite dish once relayed broadcasts of historical events like the Apollo 11 moon landing. Now it's on the market.
Dengue fever, a nasty disease caused by a virus, is just beginning to show up in the U.S. It's carried from person to person by mosquitoes, and one researcher studying the spread is looking for clues in the age of the insects. But it's not very easy to tell how old a mosquito is.
Back from near-extinction, the gray wolf will soon be removed from the endangered species list. Now, Wyoming has struck a deal with the federal government to allow trophy hunting of the predator in certain parts of the state. But the move has drawn the ire of environmentalists.
When you gaze into your sweetheart's eyes, look for enlarged pupils. Studies show that our pupils dilate when we feel strong emotions. Psychologist Bruno Laeng, of the University of Oslo, explains how scientists are using "pupillometry" and what pupil diameter suggests about mental activity.
In his book The Science of Yoga: The Risks and the Rewards, New York Times science writer and long-time yoga practitioner William Broad investigates popular health claims about yoga--that it boosts metabolism, for example--and finds that scientific studies tell a different story.
Reporting in Science, researchers write that an FDA-approved drug for skin cancer had surprising results in mice with Alzheimer's. The drug rapidly cleared up amyloid protein from the brain and improved cognitive function. Co-author Gary Landreth discusses the drug's potential as a therapy for Alzheimer's.
Several times in earth's history continents have collided to form supercontinents only to later break apart. Geologist Ross Mitchell discusses a new study in Nature that predicts in 50 to 200 million years time the Americas and Eurasia will collide to form a supercontinent over the Arctic.
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