Roger Penrose (1931 - ) - Biography - MacTutor History of Mathematics
Sir Roger Penrose: The man who proved black holes weren't 'impossible' - BBC News
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Sir Roger Penrose in Conversation with Janna Levin
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Penrose Triangle -- from Wolfram MathWorld
Penrose triangle, optical illusion, black outlines. Penrose tribar, an impossible object, appears to be a solid object, made of three straight bars Stock Photo - Alamy
Roger Penrose | Biography, Books, Awards, & Facts | Britannica
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