1) The name "Bluetooth" comes from the 10th-century Danish king, Harald Bluetooth, who united Denmark and Norway.

2) The Olympic motto is "Citius, Altius, Fortius," which is Latin for "Faster, Higher, Stronger."

3) In Japanese mythology, deities known as kami are revered and play integral roles in Shinto beliefs and practices. Figures such as Amaterasu (goddess of the sun), Susanoo (god of storms), and Izanagi and Izanami (creators of the world) feature prominently, along with legendary creatures like dragons and kitsune.

4) Michael Phelps, an American swimmer, has won a total of 28 Olympic medals, including 23 gold medals, making him the most decorated Olympian of all time.