Eberhard Gustav Heinrich Nathanael Dennert (born July 31, 1861 in Pützerlin in Stargard , † June 18, 1942 in Bad Godesberg ) was a German naturalist, philosopher, senior teacher and founder and leader of the Kepler League . He attended the Realgymnasium in Lippstadt and was there a pupil, u. a. by Hermann Müller . Studied natural sciences in Bonn and Marburg, where he also received his doctorate in 1884. In 1885 passed the state examination. Less