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Of the duo that created 3M's now-ubiquitous Post-it Notes, Spencer Silver was, quite literally, the glue. Silver, a chemist from Texas, created the adhesive that gives Post-it Notes their stickiness.

3M employee Art Fry had a problem: When he sang with his church choir, his paper bookmarks fell out of his hymnal. Thankfully for Fry, his... An Idea That Stuck: How A Hymnal Bookmark Helped Inspire ...