“Kung fu” isn’t just a term for Chinese martial arts . . . it refers to anything that takes time, patience, and energy to study and learn.
Tennis balls were originally white, but they officially switched to yellowish-green in 1972 so they’d show up better on TV. Wimbledon kept on using white balls until 1986.
The college with the most national football championships is . . . Princeton, with 28. They were winning most of them in the late 1800s, long before most other schools were competing.