Word: legging
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Dates: during 1990-1999
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Timing may also explain the progression of fins to feet. In tetrapods (four-legged animals), feet do not grow straight out of the leg, proceeding from the ankle out, but develop in a fanlike progression that runs from the smallest digit to the largest. In Geneva, Duboule and his colleagues tracked the activity of four Hox genes in the budding feet of embryonic mice and found precisely this pattern. By contrast, studies showed that in the zebrafish, the Hox genes switch off earlier, perhaps to ensure that a flexible fin ray (useful for swimming) will form in the place...
...worried should Americans be? Plenty, suggests David Quinn, 41, who lives in Briarcliff Manor, New York. An avid jogger, Quinn was stretching in his backyard when he spotted a little black dot on his leg. Once he realized that it was a tick, he quickly removed it with a pair of tweezers. But not quickly enough. Four days later, Quinn fell violently ill. "I had a fever of 102 degrees, and it felt like a hammer was banging in my head," he recalls. "I couldn't keep my head up, but I couldn't lie down either because my back...
...talk Daniel Vonk, a teacher from Fernandina Beach, Florida, out of going to the Mayo branch in Jacksonville because its fees were so high. Vonk went anyway, on a referral from a sports-medicine specialist who had done an mri when he learned that an ache in Vonk's leg had persisted for more than a year. Mayo specialists diagnosed the problem as bone cancer and subjected Vonk to three operations; Vonk also spent six months in a partial body cast and a year on crutches. The bills were high, all right: even with his insurance benefits Vonk...
Another well-documented example of the brain's need to fill in the blanks is the phenomenon of phantom limbs. When an arm or a leg is amputated, the victim almost invariably "feels" sensations like pain or itching, often very strongly, in the missing limb. What's happening? The brain carries within it a mental map of the body, a well-formed sense of where every part is in relation to every other. That's why it's possible for you to extend your arm and then, with your eyes closed, bring it in to touch the tip of your...
...determining whether someone stays on welfare or goes to work. Being poor means making choices: the phone bill or the gas bill? Cough medicine or snow boots? In hard times, health insurance is a luxury; you can't eat peace of mind. So when Briana Harris, 17, fractured her leg sliding into home in a softball game last month, her parents' pain was as real as hers. "We're going to be faced with incredible hospital costs," says Denise O'Brien, a 45-year-old mother of three. "We gave up our insurance last December. When income is low, health...