I rise at 5 a.m., wishing that I could sleep longer. But my circadian rhythm and the beautiful melodies of the birds prevent ...

Light exposure at night may disrupt our body's internal clocks, or circadian rhythms, that keep physiological processes ...

Bright afternoon and early evening light exposure in adolescents leads to lower melatonin levels and delays circadian rhythms ...

Light pollution, or artificial light at night (ALAN), is a widespread phenomenon in areas with dense human populations.

Wendy Kopp, the CEO and co-founder of Teach For All, believes she’s “figured out jet lag.” The solution sounds simple, but ...

Struggling with sleep after 50? Discover why restful sleep is essential for women’s health, how to spot signs of sleep apnea, and tips to improve your sleep naturally.

You may have heard that your circadian rhythm is like your inner clock, managing your sleep-wake cycles. But science is now ...

Yet greater awareness of sleep deprivation’s consequences hasn’t translated into a better-rested populace. Data from the CDC ...

As a physician who’s spent years working with high performers - from military operators to hospital physicians - I’ve seen what happens when the body is forced to live out of sync with its natural ...

Discover the hidden signs your circadian rhythm is sabotaging your energy, mood, and health. Learn to recognize and fix ...

To find out where you could be going wrong, we spoke to four sleep experts about what your nighttime routine should really ...

When is the best time to take nap? A sleep doctor reveals the optimal time of day to take a nap in order to feel rested and ...