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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
The average adult has about 21 square feet of skin.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).