Cosmos
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Episode Synopsis

Extra dimensions-beyond length, width, height-seem the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Could deep reality be so strange? And, anyway, why would we care?

Episode Segments

1. Lawrence M. Krauss
2. Michio Kaku
3. David J. Gross
4. Nima Arkani-Hamed
5. Juan M. Maldacena
6. Roger Penrose

Are there Extra Dimensions?

Discussion