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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Asthma cases in Americans are about 75% higher today than they were in 1980.