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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The average adult has about 21 square feet of skin.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.