Brian Greene is a Professor of Theoretical Physics at Columbia University and one of the best selling science authors of all time. His latest book, Until the End of Time: Mind, Matter, and Our Search for Meaning in an Evolving Universe, is a personal look at some of the fundamental questions of existence through the lens of physics. He chats to Robin about the book, why he became a vegetarian, and then vegan, at age 9, and whether alien lifeforms care about maths…

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