The average cat sleeps about 2/3 of the day.
203
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
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
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
Bats sleep 18-20 hours per day.
5
Cows can sleep standing up, but they can only dream lying down.
745