Dartmouth College

Biological clock discoveries by 3 Americans earn Nobel prize

Three Americans won a Nobel Prize on Monday for discovering key genetic "gears" of the body's 24-hour biological clock, the mechanism best known for causing jet lag when it falls out of sync.

Problems with our body clock have also been linked to such disorders as sleep problems, depression, heart disease, diabetes and obesity. Researchers are now trying to find ways to tinker with the clock to improve human health, the Nobel committee said in Stockholm.

It awarded the $1.1 million (9 million kronor) Nobel Prize in Physiology or Medicine to Jeffrey C. Hall and Michael Rosbash, who worked together at Brandeis University in Massachusetts, and Michael W. Young of...