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Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.

