News tagged with night

Sleep, Alzheimer's link explained

A good night's sleep refreshes body and mind, but a poor night's sleep can do just the opposite. A study from Washington University School of Medicine in St. Louis, Radboud University Medical Centre in the Netherlands, and ...

Jul 10, 2017
popularity192 comments 1

Insomnia associated with increased risk of suicidality

People who suffer from insomnia are three times more likely to report thoughts of suicide and death during the past 30 days than those without the condition, reports a new meta-analysis from researchers at the Perelman School ...

Jun 07, 2017
popularity3 comments 0

Losing sleep over climate change

Climate change may keep you awake—and not just metaphorically. Nights that are warmer than normal can harm human sleep, researchers show in a new paper, with the poor and elderly most affected. According to their findings, ...

May 26, 2017
popularity45 comments 5

Night

Night or nighttime is the period of time when the sun is below the horizon. This occurs after dusk. The opposite of night is day (or "daytime" to distinguish it from "day" as used for a 24-hour period). The start and end times of night vary based on factors such as season, latitude, longitude and timezone.

At any given time, one side of the planet Earth is bathed in light from the Sun (the daytime) and the other side of the Earth is in the shadow caused by the Earth blocking the light of the sun. This shadow is what we call the darkness of night.

This text uses material from Wikipedia, licensed under CC BY-SA

Subscribe to rss feed