A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
47% of people have a nightmare at least once a month.
186
You forget 90% of your dreams.
256
The human brain is more active during sleep than during the day.
28
Lack of water is the #1 trigger of daytime fatigue.
148