Leif Tronstad, Norwegian chemist and military leader (died 1945)

Leif Hans Larsen Tronstad was a Norwegian inorganic chemist, intelligence officer and military organizer. He graduated from the Norwegian Institute of Technology in 1927 and was a prolific researcher and writer of academic publications. A professor of chemistry at the Norwegian Institute of Technology from 1936, he was among the pioneers of heavy water research, and was instrumental when a heavy water plant was built at Vemork.

March 27 is the 86th day of the year in the Gregorian calendar; 279 days remain until the end of the year.