What makes us the way we are? Why are some people predisposed to be anxious, overweight or asthmatic? How is it that some of us are prone to heart attacks, diabetes or high blood pressure? There's a list of conventional answers to these questions. We are the way we are because it's in our genes: the DNA we inherited at conception. We turn out the way we do because of our childhood experiences: how we were treated and what we ...

One of the most encouraging developments to come out of the TIME/ABC News Summit on Obesity earlier this month was an emerging consensus among nutrition experts about what constitutes a healthy diet. Here, one of America's most prominent diet gurus summarizes key points of agreement. As a veteran of the diet wars, I think it's time to call a truce. Rather than hear experts argue, most people want practical information they can use. Significant points ...

That's what the latest analysis of national health data on adolescents shows. Between 1988-94 and 2005-06, the percentage of teens with hearing loss jumped by about a third, from 15% of 12-to-19-year-olds to 19.5%. And the reason may not be the ubiquitous earphones that snake from nearly every teen's ears during most hours of the day. A team headed by Dr. Josef Shargorodsky, an ear, nose and throat specialist at Channing Laboratory at Brigham and Women's ...

Guatemalan President Alvaro Colom has declared a state of national calamity because so many citizens do not have food or proper nutrition. Speaking in a nationally televised address late Tuesday, Colom said his declaration will make it easier to get food to the thousands of Guatemalan families who are in dire need. "This will help us access resources from the international community that are generously offered for this type of situation and to mobilize national resources more rapidly," he said. ...

So ill he could not move, Wolfgang Amadeus Mozart supposedly sang parts of his final masterpiece, "Requiem," from his deathbed. Two centuries later, the exact cause of the Austrian composer's premature death, in December 1791 at age 35, is still a mystery. Theories abound. It's known that his entire body was so swollen he couldn't turn over in bed; some say jealous rivals poisoned him, while others suggest scarlet fever, tuberculosis, or lethal trichinosis from undercooked pork. Now, ...

Amidst all the other tumult, causes and revolutions of the 1960s — race, sex, war, feminism — the fight of the fat is a historical footnote. But America's overweight had their cause too. When hippies started staging "be-ins" to protest the Vietnam War, the first fat activists co-opted the idea: they staged their own event in New York City's Central Park, dubbed it a "Fat-In" and ate ice cream while burning posters of uber-thin model Twiggy. Viva la revolución. ...

You have a degree in astrophysics and you know how to fly a jet. You've endured years of preparation and training, logged thousands of hours of flight time and even survived NASA's terrifying "vomit comet" weightlessness test. Now you're up in space for the very first time, floating around the shuttle's cabin, and as you look out of the window, you realize something: you're hungry. What are you going to eat? Initial voyages into space introduced questions scientists ...

The little number on the tag on a pair of pants that indicates size can mean a lot to a person, and retailers know it. That's why, in recent years, as the American population has become generally more overweight, brands from the luxury names to the mass retail chains have scaled down the size labels on their clothing. "You may actually be a size 14 and, according to whatever particular store you're in, you come out a size ...

Correction Appended: April 21, 2009 Think that all sugars are the same They may all taste sweet to the tongue, but it turns out your body can tell the difference between glucose, fructose and sucrose, and that one of these sugars is worse for your health than the others. In the first detailed analysis comparing how our systems respond to glucose and fructose, , researchers at the University of California Davis report in the Journal of Clinical Investigation that consuming ...

Indolent cows languidly chewing their cud while befuddled motorists honk and maneuver their vehicles around them are images as stereotypically Indian as saffron-clad holy men and the Taj Mahal. Now, however, India's ubiquitous cows — of which there are 283 million, more than anywhere else in the world — have assumed a more menacing role as they become part of the climate change debate. By burping, belching and excreting copious amounts of methane — a greenhouse gas that traps 20 ...