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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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There are 20 feet of blood vessels in each square inch of human skin.
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The familiar sounds of your heart are made by the heart's valves as they open and close.