Jürgen Aschoff

Jürgen Walther Ludwig Aschoff (January 25, 1913 – October 12, 1998) was a German physician, biologist and behavioral physiologist. Together with Erwin Bünning and Colin Pittendrigh, he is considered to be a co-founder of the field of chronobiology.

Aschoff's work in the field of chronobiology introduced ideas of light interactions in the circadian rhythms of nocturnal and diurnal species as summarized by Aschoff's Rules. Provided by Wikipedia