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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.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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