In 1942 Enrico Fermi and a team of scientists in Chicago created the world's first nuclear fission chain reaction.
In 1903, Orville and Wilbur Wright completed the world's first powered flight. It lasted 12 seconds.
Jews light candles and lamps in memory of the tiny amount of oil that kept the Temple lamps burning for 7 days.
Nobody is sure why it is called 'Boxing Day'. It may be because people gave each other presents in boxes.