The strangers in your dreams are actually people that you've seen in real life.
50
Bats sleep 18-20 hours per day.
5
You burn more calories sleeping than you do watching television.
348
Termites work 24 hours per day and they do not sleep.
57
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
47% of people have a nightmare at least once a month.
186
A new baby usually deprives each of it's parents around 350-400 hours of sleep in the first year. That is one entire nights sleep per week, per parent.
194