This sound comes from Bill Nye the Science Guy, the educational television series hosted by Bill Nye in the 1990s. The chant from the theme became one of the most memorable parts of the show and later spread through meme culture, reaction edits and classroom jokes online. It still gets used because the phrase is instantly recognizable to many viewers and quickly frames a clip as scientific, nerdy or deliberately over-explained. Its short length also makes it easy to drop into fast comedic cuts.