German science writer. He studied psychology and biology at the University of Konstanz and at the Massachusetts Institute of Technology. Working as a freelancer first for the German weekly newspaper Die Zeit and other magazines, he later became an editor and reporter for the Berlin-based newspaper Der Tagesspiegel. His articles have earned him a number of national and international prizes. Kast has written several popular science books, some of which became best selling books that have been translated in numerous languages.