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Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
There are more bacteria in your mouth than there are people in the world.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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The familiar sounds of your heart are made by the heart's valves as they open and close.