Post-it Note: The Accidental InventionA failed superglue found its purpose in a church choir.

From the show

The Secret Life of Objects

Discover the serendipitous story of the Post-it Note. Born from a failed experiment for a super-strong adhesive, a weak, reusable glue sat useless for years. It took another scientist's frustration with falling bookmarks to connect the seemingly useless invention with the perfect problem, creating the office staple we know today.