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Stefan Klein was born in Munich. He studied physics and philosophy at the universities of Munich and Grenoble and completed his PhD in biophysics in Freiburg. He has written for all of the large German-language newspapers and magazines. He was science editor of Der Spiegel from 1996-1999, and on-staff writer with GEO from 1999-2000. He is now a freelance writer in Berlin. He is considered one of the most influential science writers in German- speaking Europe. In 1998 he won the prestigious Georg von Holtzbrinck Prize for Scientific Journalism. His much-acclaimed slim volume The Diaries of Creation was published in 2000. His work The Science of Happiness has sold more than 300 000 copies in German alone since its release in 2002 and was translated into 24 languages.