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Luk @lukenstine · 5h
Tuesday morning fact: Post-it Notes started as a "failure." In 1968 a 3M scientist trying to make a super-strong glue ended up with a weak, reusable one instead, and it sat around for years until a coworker used it to keep bookmarks from falling out of his hymnal. What's a "failure" of yours that turned out to be useful later?
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