Daylight Saving Time Has a Dark Side

A train hurtled around a corner at 82 mph, eventually coming off the rails and killing four passengers. Decades earlier, faulty decision-making resulted in the deaths of the seven-person crew of the Space Shuttle Challenger. Years before these events, a stuck valve regulating the supply of coolant to a nuclear reactor nearly resulted in the meltdown of a nuclear plant in Pennsylvania. In each of these cases, poor or inadequate sleep was one of the factors that contributed to the f

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