When millions of people turn off their lights for Earth Hour each year, something remarkable happens in the night sky above ...

At night, that used to be the moon and stars – until humans invented artificial light. "The insects treat a point light source at night very much in the same way as they would treat the sky ...

Being exposed to too much artificial light through bedroom windows while you sleep at night was linked to a higher risk of diabetes in a study of tens of thousands in China. Here’s what you can ...

At night, light can trigger insomnia, which is itself a risk for many illnesses. ... Blackout curtains are a must for bedroom windows facing exterior light sources.

Continuous exposure to these light sources at night can suppress melatonin production, a hormone that promotes sleep. This can disrupt the 24-hour internal clock in people and impair sleep.

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

Bright light in the day and dark when you sleep is good for your health, study finds : Shots - Health News Diet, exercise and sleep are fundamental to our health, but so it our relationship to light.