The healthy debate over daylight saving time

03/10/2013 | ScientificAmerican.com

Setting the clock ahead an hour for daylight saving time throws off circadian rhythms and contributes to traffic accidents, workplace injuries and heart attacks, say chronobiologists. Even cows feel the effects of the change when they're milked an hour earlier than usual, Bora Zivkovic writes, joining in the universal jet lag we experience when the clock changes.

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