Lack of water is the #1 trigger of daytime fatigue.
148
The strangers in your dreams are actually people that you've seen in real life.
50
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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
If you hold farts in during the day, they'll just come out when you sleep.
16
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33