| Agassiz, (Jean) Swiss-born American naturalist noted for his study of fossil fish and for recognizing from geologic evidence that ice ages had occurred in the Northern Hemisphere. |
Agassiz  (āg'ə-sē) Pronunciation Key
Swiss-born American naturalist whose studies of glaciers and their movement introduced the idea of the ice age in 1840. Agassiz later revolutionized science education in the United States by emphasizing direct observation of the natural environment. |