In 1832, John C. Calhoun became the first U.S. vice president to resign his office.
In 1846, Iowa was admitted as the 29th U.S. state.
In 1912, San Francisco's first municipally owned streetcars began service.
In 1973, President Richard Nixon signed the Endangered Species Act into law.
In 1981, the first American 'test-tube baby' was born in Norfolk, Va.
TODAY'S FACT:
'Marvel Comics' was the first pulp …