it notes were actually the product of an engineering mistake by 3M scientists who accidentally stumbled upon an adhesive like none other that could stick and be repositioned on just about any surface. The yellow color was also chosen by accident; a lab next-door to the Post-it team had scrap yellow paper, which the team initially used.The sticky pad's investors, 3M scientists Arthur Fry and Spencer Silver, were inducted last month into the National Inventors Hall of Fame.
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