In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Life of a Medical School Student
Analogy for How Magnetic Field Strengths Increase
The National School Lunch Program
Guidelines for Field Triage of Injured Patients, Centers for Disease Control, 2011