Ivan Wallin
| Ivan Wallin | |
|---|---|
| Born |
22 January 1883 Stanton, Ohio, US |
| Died | 6 March 1969 (aged 86) Phoenix, Arizona |
| Residence | Boulder, Colorado |
| Citizenship | American |
| Nationality | US |
| Fields |
Anatomy Cell biology |
| Institutions | University of Colorado Medical School |
| Alma mater |
University of Nebraska (MSc) New York University (DSc) |
| Known for | Endosymbiotic theory |
| Influences | Lynn Margulis |
| Spouse | Eva Louise Shepard |
Ivan Emanuel Wallin (22 January 1883 – 6 March 1969) was an American biologist who made the first experimental works on endosymbiotic theory. Nicknamed the "Mitochondria Man", he claimed that , which are cell organelles, were once independent bacteria, as supported by his comparative studies and culture of isolated mitochondria. From 1922, he published a series of papers titled "On the nature of mitochondria" in the American Journal of Anatomy which became the experimental foundations of his claims. He was the first person to specifically postulate that eukaryotic organelles originated from bacteria, and that symbiosis is a major force in creation of new species.
Wallin was Professor of Anatomy at the University of Colorado Medical School. He was noted for his eccentric life in the academia, such as his preference for exclusively practical demonstration rather than lecturing, his frequent parties for students and an annual Christmas glogg party.
Wallin was born to Swedish immigrant parents, Claes Henvich (Henry) (Svensson) Wallin and Emma Augusta Maria (Johnsdotter) Johnson, in a small farming community at Stanton, Ohio. He was educated at Augustana College at Illinois and Princeton University. He obtained a BS degree from the University of Iowa in 1905. He briefly taught biology at the University of Nebraska from where he earned his MSc in 1908. In 1915 he obtained his doctorate degree (DSc) in anatomy from the New York University. His thesis was on the tissue development, differentiation, and morphology of the lamprey Ammocoete. From 1918, he was professor of anatomy at the University of Colorado Medical School.
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