Multiverse: One Universe or Many?

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World Science Festival

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The inflationary theory of cosmology, an enduring theory about our universe and how it was formed, explains that just after the Big Bang, the universe went through a period of rapid expansion. This theory has been critical to understanding what’s going on in the cosmos today. But now, this long-held notion—which seems to suggest as-yet-unproven and perhaps unprovable features such as the multiverse—is under increasing attack. Through informed debate among architects of the inflationary theory and its prime competitors, this program explored our best attempts to understand where we came from.

This program is part of the Big Ideas Series

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Original Program Date: June 1, 2013
MODERATOR: John Hockenberry
PARTICIPANTS: Andreas Albrecht, Alan Guth, Andrei Linde, Neil Turok

Multiverse: In the Beginning 00:04

John Hockenberry's Introduction 4:33

Participant Introductions 6:35

The Big Bang theory. 8:34

The vacuum of space and the Higgs field. 12:33

What is inflationary theory? 15:40

What does the inflationary model explain? 21:36

What is the experimental evidence of the multiverse? 26:22

What is so exciting about the Planck satellite?31:56

The CMB and what it means to a multiverse. 40:43

What came before the big bang? 46:45

Does string theory help predict there is a multiverse? 53:45

Having no choice is a hard choice to make. 1:00:33

Is the horizon of a black hole is much like the edge of the universe? 1:05:11

Is there a difference between a multiverse and two universes colliding? 1:11:23

Depending on infinity for predictions. 1:16:15



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