How a failed attempt at super glue created the post-it note!

Spencer Silver created one of the most useful office products in the world while trying to invent something else. In 1968, Silver was working as a scientist at 3M. His goal was to create a super strong adhesive. Instead, he accidentally invented the opposite, a glue that stuck lightly but could be removed easily without leaving residue. At first, the invention had no clear purpose. For years, Silver shared the idea inside the company, but no one knew how to use it. Then another employee, Art Fry, found a solution. While singing in a choir, he needed bookmarks for his hymnal that wouldn't fall out. The removable adhesive worked perfectly. The small sticky notes were born. Today, Post-it notes are used in offices, schools, and homes around the world. Silver didn't set out to create sticky notes. Sometimes innovation begins when a mistake turns out to be more useful than the original plan.