Portrait of Gunnar Kallen

Wolfgang Pauli referred to him as ''my discovery,'' Robert Oppenheimer described him as ''one of the most gifted theorists'' and Niels Bohr found him enormously stimulating. Who was the man in question, Gunnar Källén (1926-1968)?

His appearance in the physics sky was like a shooting star. His contributions to the scientific debate caused excitement among young and old. Similar to his friend and men...