english: The way you would put it to a nine-year-old is to say, "If a meteorite was coming to hit the Earth, how would you figure out if it was going to or not?"
non_english: Način na koji biste pitali  devetogodišnjaka bio bi: "Ako bi meteorit pretio  da udari u Zemlju, kako bi mogao da znaš  da li će udariti ili ne?"