The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
You burn more calories sleeping than you do watching television.
348
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
People who sleep late have more mental stamina and can outperform early risers.
33
Bats sleep 18-20 hours per day.
5
The human brain is more active during sleep than during the day.
28