Across millions of years of evolution, from ape to upright, email-answering, independent individual humans have developed an internal clock of alertness and exhaustion, driven primarily by the light ...

We can't talk about morning sunlight and improved sleep hygiene without first addressing our circadian rhythm. This is the body's 24-hour sleep-wake cycle. It naturally responds to light and darkness, ...

For a good night of sleep, consider getting your circadian rhythm back in sync with the sun. Here’s how to do it.

it’s that I’m not alone in thinking overhead lighting is cruel and cold and simply can’t be good for the circadian rhythms. Lamps make everything feel kinder and more intimate — so when my ...

Sunlight plays a huge role in our energy levels and sleep quality. One study found that those who got enough morning sunlight ...