Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Children are poisoned most frequently by eating harmful plants.
13
Your ears secrete more earwax when you are afraid than when you aren't.
229
The male fetus is capable of attaining an erection during the last trimester.
75
The pupil of the eye expands as much as 45 percent when a person looks at something pleasing.
130
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15