Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Human teeth are almost as hard as rocks!
47
Smokers get ten times more wrinkles than non-smokers.
171
Redheads require up to 20% more anesthesia to be knocked out.
112
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
A woman's sense of smell is most sensitive during ovulation.
34
The human brain is more active during sleep than during the day.
28