People who sleep late have more mental stamina and can outperform early risers.
33
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The human brain is more active during sleep than during the day.
28
Bats sleep 18-20 hours per day.
5
The average person falls asleep in seven minutes.
115
You forget 90% of your dreams.
256