Louis Agassiz
Jean Louis Rodolphe Agassiz ( AG-ə-see; French: [aɡasi]; May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he received a PhD at the University of Erlangen and a medical degree at the Ludwig-Maximilians-Universität München.