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In theory, having a circadian rhythm should help anticipating daily environmental changes (light, temperature etc.) so that the metabolic performance is maximized. In practice, mice chronically exposed to environmental light-dark cycles with a period length dramatically shorter or longer than that of their circadian clock are prone to become obese. ...


A double-blind, prospective study during the fall of 1979 investigated the association between the menstrual cycles of 305 Brooklyn College undergraduates and their associates and the lunar cycles. .... Approximately 1/3 of the subjects had lunar period cycles, i.e. a mean cycle length of 29.5 ± 1 day. Almost 2/3 of the subjects started their ...

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