Scientists suggest at least 9 hours of sleep a night. Unfortunately, many today get far less time in bed. A 2013 study exposed a 6.8 hours average. This is a far cry from the 8-10 hours recommended by professionals. Many students need to awaken around 6-7 a.m. Waking up at this time, one would need to sleep as early as 9-10 p.m. the night before. A study done by Edison Research says that more than half of our nation is usually awake by 6:30 a.m.
Some other interesting sleep facts:
Sleep inertia is the feeling of grogginess in the morning. The brain gradually wakes up with the rest of our body, a completely normal process.
Some people dream in black and white.
A surprising 15% of people sleep walk.
One’s ability to smell actually decreases when asleep.
Pain tolerance is reduced with a lack of sleep.
Only humans have the ability to delay sleep, no other mammal.
Deaf people sign in their sleep the same way others talk in their sleep.