In this season of short days and long winter nights, it’s easy to feel out of sorts. Those who suffer from seasonal affective disorder, a form of depression that’s closely linked to the circadian rhythms that govern our sleep cycles, know this all too well. But those same rhythms, which are themselves governed by biological clocks, can affect much more than mood and sleep.
Q&A: How circadian rhythms have been implicated in diseases from dementia to cancer
