Crucigrama Famous scientistsVersión en línea Let's play and discover famous people who helped with scientific improvements through the years. por Mile Cárdenas 1 2 Who discovered Penicillin? 3 Who wrote "A Brief History of Time"? 4 Who developed the Theory of General Relativity? 5 6 7 8 9 Who discovered Radium and Polonium? 10 Who is one of the main contributors of research on extraterrestrial life? 2 5 6 3 9 10 1 7 8