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Brian Greene

Brian Randolph Greene (born February 9, 1963) is an American physicist. Greene was a physics professor at Cornell University from 1990 - 1995, and has been a professor at Columbia University since 1996 and chairman of the World Science Festival since co-founding it in 2008. Greene has worked on mirror symmetry, relating two different Calabi–Yau manifolds (concretely relating the conifold to one of its orbifolds). He also described the flop transition, a mild form of topology change, showing that topology in string theory can change at the conifold point.

Greene has become known to a wider audience through his books for the general public, ''The Elegant Universe'', ''Icarus at the Edge of Time'', ''The Fabric of the Cosmos'', ''The Hidden Reality'', and related PBS television specials. He also appeared on ''The Big Bang Theory'' episode "The Herb Garden Germination", as well as the films ''Frequency'' and ''The Last Mimzy''. He is currently a member of the board of sponsors of the ''Bulletin of the Atomic Scientists''.

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