Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
57
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
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29