Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
It is possible to go blind from smoking too heavily.
50
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
The average sperm cell swims at 8 inches per hour.
76
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
12
The human brain is more active during sleep than during the day.
28
Ernest Hemingway survived through anthrax, malaria, pneumonia, dysentery, skin cancer, hepatitis, anemia, diabetes, high blood pressure, two plane crashes, a ruptured kidney, a ruptured spleen, a ruptured liver, a crushed vertebra, a fractured skull, and more.
67