A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
Termites work 24 hours per day and they do not sleep.
57
44% of kids watch television before they go to sleep.
106
You burn more calories sleeping than you do watching television.
348
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
28
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33