The multiverse hypothesis, suggesting that our universe is but one of perhaps infinitely many, speaks to the very nature of reality. Join physicist Brian Greene, cosmologists Alan Guth and Andrei Linde, and philosopher Nick Bostrom as they discuss and debate this controversial implication of forefront research and explore its potential for redefining the cosmic order. Moderated by Robert Krulwich and featuring an original musical interlude, inspired by parallel worlds, by DJ Spooky.

This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation.

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Original Program Date: June 13, 2009
MODERATOR: Robert Krulwich
PARTICIPANTS: Alan Guth, Brian Greene, Andrei Linde, Paul D. Miller, Nick Bostrom

Introduction with Brian Greene 00:00

Musical interlude 25:15

Participant Introductions 33:49

How do we know there was a Big Bang 35:50

How do we get from a single universe to a multiverse. 47:14

Is the universe expanding and how fast? 01:00:25

What does six dimensional space look like? 01:08:00

How do we know there is a multiverse? 01:13:48

Bryce DeWitt on the multiverse concept 01:24:40

What if we assume the universe is the simulation hypothesis? 01:37:14

This program is part of The Big Idea Series, made possible with support from the John Templeton Foundation.

NOVA leads viewers on a mathematical mystery tour a provocative exploration of math's astonishing power across the centuries. We discover math's signature in the swirl of a nautilus shell, the whirlpool of a galaxy and the spiral in the center of a sunflower. Math was essential to everything from the first wireless radio transmissions to the prediction and discovery of the Higgs boson and the successful landing of rovers on Mars. But where does math get its power? Astrophysicist and writer Mario Livio, along with a colorful cast of mathematicians, physicists and engineers, follows math from Pythagoras to Einstein and beyond, all leading to the ultimate riddle: Is math an invention or a discovery? Humankind's clever trick or the language of the universe?

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Twenty-five hundred years before the reign of Julius Caesar, the ancient Egyptians were deftly harnessing the power of engineering on an unprecedented scale. Find out more in Season 1, "Egypt". #EngineeringanEmpire
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History's greatest engineering and architectural achievements.

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