astrophysicist little kids big questions split
What existed before the universe? Theoretical physicist explains
CNN Opinion joins forces with the John Templeton Foundation to answer kids' biggest questions.  In this video, theoretical physicist Brian Greene explains what came before the universe to a 9-year-old from Brooklyn. Greene is a professor of physics and mathematics at Columbia University and the co-founder of the World Science Festival.
02:02 - Source: CNN
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astrophysicist little kids big questions split
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