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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.