Cows can sleep standing up, but they can only dream lying down.
745
47% of people have a nightmare at least once a month.
186
The average cat sleeps about 2/3 of the day.
203
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
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
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33