1980Post-it Notes began with a glue that was “too weak”.

Wacky WorldInventions

3M scientist Spencer Silver created a low-tack reusable adhesive in 1968. Years later colleague Art Fry used it for bookmarks in his hymn book, and Post-it Notes launched in 1980.

Another wacky fact → All facts

Explore more Inventions facts

<span class="aj-year">1873</span>Jeans were patented in 1873.<span class="aj-year">1928</span>Penicillin was discovered because a lab dish was left uncovered.<span class="aj-year">1793</span>The cotton gin changed cotton processing forever.