为什么陨石坑里没有陨石撞击地球后，坑里的陨石去哪儿了8

The passage discusses the number and characteristics of confirmed meteor craters on Earth, including the largest one in South Africa (Friedburg), believed to be from a comet, and the Chicxulub crater linked to the extinction of dinosaurs. Many craters have been lost due to geological changes, and the mystery of why some craters lack found meteorites is raised.