Simplify the following text for a Grade 9 native English-speaking person.
Original: Schack August Steenberg Krogh ( November 15 , 1874 -- September 13 , 1949 ) was a Danish professor of Romani background at the department of zoophysiology at the University of Copenhagen from 1916-1945 .
Simplified: Schack August Steenberg Krogh ( November 15 , 1874 - September 13 , 1949 ) is an Danish zoologist .