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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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There are 60,000 miles of blood vessels in every adult human.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

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