The strangers in your dreams are actually people that you've seen in real life.
50
The average person falls asleep in seven minutes.
115
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The human brain is more active during sleep than during the day.
28
44% of kids watch television before they go to sleep.
106
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23