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No wonder I always seem to have 'social jetlag' (the latest name for getting up too early in the morning if you have the bodyclock of an owl - like me). I particularly dislike people who tell me living by daylight 'is' natural. Nonsense. The cold-blooded animals ruled the earth until those warm-blooded mammalian ancestors worked out how to stay awake at night, move around in the cold, and feast on dormant diurnal dinosaur tails.
Till Roenneberg believes that more than half the population are in effect socially jet-lagged all the time, because their body clock is permanently out of synch with their working hours (Chronobiology International, vol 23, p 497). New Scientist
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