YouTube Treasures continues with a two part examination of the case for the Big Bang. (More)

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PBS Space Time is one of my favorite YouTube channels. This week I present a two part video series on the case for the Big Bang, and outstanding challenges for the theory that cosmologists still wrestle to solve. Today we’ll begin with the evidence for the Big Bang. Tomorrow, we’ll wrap with the problems with the theory.

City University of New York’s Lehman College astrophysics professor Matt O’Dowd is the host of PBS Space Time.