William Sanford "Bill" Nye (born November 27, 1955), popularly known as "Bill Nye the Science Guy", is an American science educator, comedian, television host and mechanical engineer. He is best known as the host of the Disney children's science show Bill Nye the Science Guy (1993–1997) and for his many subsequent appearances in popular media as a science educator.
William Sanford Nye was born in Washington, D.C., the son of Jacqueline (née Jenkins; c. 1920–2000), a codebreaker during World War II, and Edwin Darby "Ned" Nye (died 1997), a sundial manufacturer. Nye is a fourth-generation Washington, D.C. resident on his father's side of family. After attending Lafayette Elementary and Alice Deal Junior High in the city, he was accepted to the private Sidwell Friends School on a partial scholarship, graduating in 1973. He studied mechanical engineering at Cornell University, where one of his professors was Carl Sagan, and graduated with a bachelor of science degree in 1977.
Nye began his career in Seattle at Boeing, where, among other things, he starred in training films and developed a hydraulic pressure resonance suppressor still used in the 747. Later he worked as a consultant in the aeronautics industry. Nye told the St. Petersburg Times in 1999 that he applied to be a NASA astronaut every few years but was always rejected.