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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The human body produces and destroys 15 million blood cells every second.
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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.