Did aliens and humans ever co-exist on earth?
Frank Drake, determined that there was a possibility of 100,000 to 1,000,000 extraterrestrial civilizations in our galaxy alone!
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About Galaxy
A galaxy is a group of billions and billions of stars clumped together by gravity. If our planet was a house, the solar system our town, our galaxy the Milky Way, would be our country.
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I am 100% human How about you? Thanks for asking ChaCha!
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