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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.