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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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.
There are 60,000 miles of blood vessels in every adult human.
Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
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.