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Now let’s look at the sleep cycle. Imagine what would happen if
Now let’s look at the sleep cycle. Imagine what would happen if you broke your existing sleep routine and stayed awake an extra two hours? Perhaps ...

A 2001 study, Action spectrum for melatonin regulation in humans:
A 2001 study, Action spectrum for melatonin regulation in humans: evidence for a novel circadian photoreceptor, revealed a specific photoreceptor in t...