The twentieth century has thrown some major curve balls at the human psyche, from the carnage of two world wars to the invention of the hydrogen bomb, capable of releasing the fury of a stellar interior on the surface of our planet. And while the seventeenth century saw the earth pushed from the center of the universe, it was twentieth-century astronomers who told us that we were located in the suburbs of an average galaxy, hurtling away from all the other galaxies that we can see.
Why are we all flying away from one another? Isn't it obvious? The universe exploded 15 billion years ago!
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