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When the Universe Was Young and Hot

f Don Lincoln, Fermilab f. Hubble Telescope. This image is taken of galaxies that are billions of light-years away. Light takes a very long time to travel to Earth.Consequently, this photograph is of the conditions that existed billions of years ago, just a billion years or so after the big bang.Astronomers have thus created a time machine of sorts..

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When the Universe Was Young and Hot

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