Governor of Wisconsin: 5 January 1959 - 7 January 1963.
U.S. senator from Wisconsin: 8 January 1963 - 3 January 1981. Senatorial term began 5 days later than usual because he completed his term as governor before being sworn in as a senator.
Founder of Earth Day in 1970.
Awarded the Presidential Medal of Freedom in 1995.
Biography in: "The Scribner Encyclopedia of American Lives". Volume 7, 2003-2005, pages 391-393. Farmington Hills, MI: Thomson Gale, 2007.