26Switchboard: Boys to Women
Due to their "rude and abusive" behavior, young women eventually replaced the first telephone switchboard operators, who were boys.
27. Kraft's boxed mac and cheese became popular during World War II due to a cheese surplus, allowing customers to obtain two boxes for one ration point.
28. Match Day for medical residents results in a single organization choosing all residencies in a day, limiting residencies and leading to the infamous 80-100 hour resident workweek. Congress also passed laws to sustain this practice.
29. The Great Sphinx of Giza's nose has been missing since the 1400s, attributed to a zealot's actions in 1378. Archaeological findings suggest the nose was chiseled or broken off.
30. Jupiter's moon Io experiences ground movement of up to 300 feet due to tidal effects from Jupiter. Earth's typical tidal range is 3 feet in open oceans.
