Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
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Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16
The average person has over 1,460 dreams a year!
69
More people have a phobia of frogs than rats.
41
Only 1 person in 2 billion will live to be 116.
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The human brain is more active during sleep than during the day.
28
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39