Researchers from the Harvard Medical School and Brigham Women's Hospital, Massachusetts, US, have found an unlikely scapegoat for all the lazybones found dozing at work: Thomas Alva Edison, the inventor of the light bulb. In a study published in the February issue of Nature, the researchers reported that normal indoor lights can reset the human biological clock, dismantling sleep patterns and putting people in a permanent condition of jetlag. Reading or watching television after sundown, and being exposed to bright tights just before sleep essentially slows down the bio-clocks and moves the phase of peak grogginess into the wee hours of the morning.
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