I am doing wonder #473 "Who Invented Sticky Notes?" Did you know that the adhesive on the back of the sticky note lets you be able to reuse it a couple times? In 1968 Dr.Spencer Silver invented an adhesive ,he was trying to make a very strong adhesive, but instead he made a very weak one. In 1974 Art Fry was frustrated that all his bookmarks were falling out of his books. Then he remembered that Dr. Silver invented an adhesive and with that he invented sticky notes. They never ripped his pages or lost his place in the Hymnal.

Hymnal: A Book of Songs

Solution: An answer

Adhesive: A substance that is sticky allowing one thing to stick to another