According to a large study, using screens at night is delaying bedtimes, reducing the amount of shut-eye time, and the ...

A sleep doctor reveals the optimal time of day to take a nap in order to feel rested and reap the health benefits.

Sleep time was measured from sleep onset ... The target displays were 16° of visual angle in size and contained a field of 19 × 19 horizontal bars with a randomly rotated 'T' or 'L' shaped ...

Humans need 7-8 hours of daily sleep. However, in the wild, some animals rest for more than 20 hours a day to conserve energy ...