Part 1 - (8:20) Ears and Hearing
Part 2 - (8:01)
Part 3 - (6:41)
William Sanford "Bill" Nye (born November 27, 1955), popularly known as Bill Nye the Science Guy, is an American science educator and television host. He is best known for the Disney and PBS Kids children's science show Bill Nye the Science Guy (1993–1998).