Oct 30 : People who travel across many time zones, like a trip from London to Tokyo, may experience jet lag, with the body's internal 24-hour clock — the circadian rhythm — thrown out of sync with the local time at the arrival location. A new study shows that birds that fly long distances may experience a simila

Oct 30 : People who travel across many time zones, like a trip from London to Tokyo, may experience jet lag, with the body's internal 24-hour clock — the circadian rhythm — thrown out of sync with the local time at the arrival location. A new study shows that birds that fly long distances may experience a simila