04/11/2024
Did you know?
Before alarm clock existed, people used nails and candle to wake up.
This is what they do—They light up a candle, and then place it on a metal. Then they perch the nails inside the candle. They knew how to calculate the burning time, so they put the nails in the right places. As the candle melts, the nails fall and then it make a noise, thereby waking its owner up.
This is called the Roman Alarm clock.
Credit: Oluwanishola Akeju