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Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.