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Bang, crunch, freeze and the multiverse

CMB

The cosmic microwave background temperature fluctuations. Find out more in our podcast. Image courtesy NASA.

What's a multiverse? What's the future for intelligent life? And what happened 380,000 after the Big Bang. Find out in these interviews with the physicists David Spergel and Raphael Bousso, who we spoke to during Stephen Hawking's 70th birthday conference. You can also read the accompanying article.

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