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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
The longest a person has survived after a heart transplant is 24 years.
There are more bacteria in your mouth than there are people in the world.
Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.