130 books
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32 voters
Cosmology
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Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case, the idea is quite staggering.
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We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make up the Milky Way Galaxy which is one of billions of other galaxies which make up a universe which may be one of a very large number, perhaps an infinite number, of other universes. That is a perspective on human life and our culture that is well worth pondering.
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