On July 5, 1687, Isaac Newton published his Principia Mathematica, a three- volume work setting out his mathematical principles of natural philosophy.

In 1865, the Secret Service Division of the U.S. Treasury Department was founded in Washington, D.C., with the mission of suppressing counterfeit currency.

In 1935, President Franklin D. Roosevelt signed the National Labor Relations Act.

In 1937, Hormel introduced Spam; more than 9 billion cans have been sold since.

In 1946, the modern bikini, designed by Frenchman Louis Reard, was first modeled in Paris.

In 1971, President Richard Nixon certified the 26th Amendment to the U.S. Constitution, which lowered the minimum voting age from 21 to 18.

In 1994, Jeff Bezos founded Amazon as an online marketplace for books.