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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 average adult has about 21 square feet of skin.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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There are 20 feet of blood vessels in each square inch of human skin.
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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.