Astronomers say it is physically possible, because a giant impact can blast Earth rocks into space and send some of that debris toward the Moon. One science journalist wrote that, after such an impact, there could be 'bits of dinosaur bone on the moon,' though the article also says there is no evidence to support the claim. A fact check noted the idea has been discussed since Apollo 14 found Earth rocks on the Moon, but no dinosaur DNA has been discovered in space. So the Moon may hold ancient Earth debris, and perhaps a fossil clue or two, but for now the story remains a fascinating possibility, not a proven find.
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