Social media algorithms love challenges with a number. I, for one, can’t get enough of the viral 12-3-30 treadmill workout (walking at 12% incline, at a speed of three miles per hour, for 30 minutes).

A total of 20 athletes are competing under the designation "AIN" at the Milan Cortina Olympics - an abbreviation often clearly visible on their uniforms. The letters have trigged a number of questions ...

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