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Robbanó Napok by Isaac Asimov, William A. Gutsch Jr.

missing page info Add in missing page information first pub 1977 (view editions) user-added

nonfiction science challenging slow-paced
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When the universe was born some 15 billion years ago, the "big bang" produced vast clouds of hydrogen and helium. Where did everything else come from? Supernovas, the huge unstable suns whose immense convulsions and titanic explosions are the larg...

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