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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.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.