Turns out this year is the 30th birthday of 3M’s famous Post-its notes.  Who can live without these colorful sticky squares? Here’s a brief history from Wikipedia: In 1968, Dr. Spencer Silver, a scientist at 3M in the United States, with the help of Jesse Kops, a fellow scientist, accidentally developed a “low-tack,” reusable pressure sensitive adhesive.[1] For five years, [...]