The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Range of Motion of the Temporomandibular Joint, Pushing Out the Lower Jaw
Range of Motion of the Cervical Spine, Flexion, Hyperextension
Muscles of the head and neck.
Our Motion Through the Microwave Background
Bracing the head while applying pressure to the neck.