Gustaaf Adolf Frederik Molengraaff

Dutch scientist (1860-1942).

Born February 27th, 1860 in Nijmegen.

Died March 26th, 1942 at 82 years old in Wassenaar.

Occupations
explorer, geologist, photographer, university teacher

If you’re not ready to die for it, take the word “freedom” out of your vocabulary. Malcolm X