According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
There are about 1,400 different species of bacteria in your belly button.
10
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
It takes 17 muscles to smile, 43 to frown.
65
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
After an 11 year study, cell phones were shown not to increase chances of getting cancer.
14