Name the American theoretical physicist, mathematician, and string theorist who has been professor at Columbia University since 1996 and who wrote the book 'The Hidden Reality' which explores the concept of the multiverse?
The Hidden Reality The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos is a book by Brian Greene published in 2011 which explores the concept of the multiverse and the possibility of parallel universes. It has been nominated for the Royal Society Winton Prize for Science Books for 2012.
Dan Freed Daniel Stuart "Dan" Freed (born 17 April 1959) is an American mathematician, who specializes in global analysis and its applications to supersymmetry, string theory, and quantum field theory.