View the full lesson: ed.ted.com/lessons/how-many-universes-are-there The fact that no one knows the answer to this question is what makes it exciting. The story of physics has been one of an ever-expanding understanding of the sheer scale of reality, to the point where physicists are now postulating that there may be far more universes than just our own. Chris Anderson explores the thrilling implications of this idea. Lesson by Chris Anderson, animation by Andrew Park.

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