The Zebra's Stripes, A Personal No-Fly Zone
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.