It has been the subject of popular children's books, the setting for blockbuster sci-fi movies, the center of folklore and legends, and the final frontier in the Cold War space race. Earthly beings have always dreamed about the moon, but it's largely remained a mystery for centuries 鈥 until now. Are you a moon master or a lunar loser? Test your moon mastery here.
8.5 billion years |
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6 billion years |
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4.5 billion years |
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2 billion years |
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