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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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.
There are 20 feet of blood vessels in each square inch of human skin.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.