Paper clips seem like the most boring office tool, but they’ve got a rebellious history! During World War II, Norwegians turned the humble paper clip into a symbol of resistance against Nazi occupation. In 1940, after Germany invaded Norway, the Nazis banned all patriotic symbols, like pins with the Norwegian flag or the initials of…
Ever overslept because your alarm clock failed? Be glad you weren’t around in the 1400s—the first alarm clocks were a lot less reliable! Back then, people used a device called a “candle clock” or a rudimentary mechanical clock that relied on a falling weight to sound an alarm. The earliest known mechanical alarm clock was…