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The math and physics of cosmology can be really, really hard to understand. Still, George Rhee thinks it's something all of us should know something about. So he's written a book for the general reader explaining what we know about the universe and what it was like in the early days, and he tells us what we know about that time billions of years ago.
George Rhee, author of "Cosmic Dawn" and Professor of Astronomy, UNLV