Theoretical physicist Lisa Randall believes there are more dimensions to space - possibly 13 more -- than the three we experience. She's faced the challenge of describing a world that no one can see. Produced by Sarah Lilley.

Theoretical physicist Lisa Randall believes there are more dimensions to space - possibly 13 more -- than the three we experience. She's faced the challenge of describing a world that no one can see. Produced by Sarah Lilley.
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