The strangers in your dreams are actually people that you've seen in real life.
50
The human brain is more active during sleep than during the day.
28
People who sleep late have more mental stamina and can outperform early risers.
33
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11
Bats sleep 18-20 hours per day.
5
47% of people have a nightmare at least once a month.
186
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15