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
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
Bats sleep 18-20 hours per day.
5
Termites work 24 hours per day and they do not sleep.
57
People who sleep late have more mental stamina and can outperform early risers.
33
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33