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Answer: Curling
Why: Sweeping brooms in front of the stone warms the ice slightly to reduce friction and alter its trajectory.
Answer: Running barefoot
Why: A new pair bought in Rome gave him blisters, so he raced as he trained, without shoes, and set a world best of 2:15:16.2.
Answer: Quarantine laws
Why: Stockholm staged the riding in June 1956, five months before Melbourne opened, the only time one Olympics has run in two countries.
Answer: The Olympic flame
Why: It is kindled from the sun with a parabolic mirror at the Temple of Hera, and the whole relay tradition dates only from the 1936 Berlin Games.
Answer: Athens
Why: The revived Games drew 241 competitors from 14 nations to 43 events, and every single one of them was a man.
Answer: A silver medal
Why: Winners also collected a diploma, runners-up took a copper medal, and the familiar three-metal ranking only began in 1904.