A closer look
One of the most profitable mistakes in history came from a failed search for super‑strong glue. In the 1960s, a chemist at 3M created an adhesive that was oddly weak: it stuck lightly but peeled off cleanly. Useless for heavy industry, it sat on a shelf for years. Only later did another employee realize it could be perfect for bookmarks that would not slip out of hymnals, leading to what became Post‑it Notes. Similar 'failures' gave us penicillin (from contaminated petri dishes), microwave ovens (from melted candy in a scientist's pocket near radar equipment), and even safety glass (from a spilled plastic solution on a glass beaker that did not shatter). History quietly rewards those who stay curious when things go wrong instead of just discarding them. The lesson is uncomfortable: your most valuable idea might already be sitting in something you wrote off as a bad prototype, if you are willing to look at it sideways.
