MSNBC - The mysteries of time and sleep

MSNBC - The mysteries of time and sleep : "The mysteries of time and sleep Lose an hour, gain insights with daylight-saving switch By David Ropeik MSNBC contributor Updated: 2:10 p.m. ET April 1, 2005 It’s that time of year again, when crocuses bloom, the lawn starts to need mowing, and most Americans lose an hour’s sleep setting their clocks ahead. (Remember? Spring forward, fall back.) So here are answers to your questions about the time switch — and about sleep."