Something like 10000 meteorites hit Earth a year. Three-quarters land in the ocean. Given how long they last, and how fast they come down, you might … - Guy Consolmagno

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Something like 10000 meteorites hit Earth a year. Three-quarters land in the ocean. Given how long they last, and how fast they come down, you might expect to see a meteorite roughly every two square kilometers. But in fact, you don't. They're completely lost.