United States naturalist (born in Switzerland) who studied fossil fish; recognized geological evidence that ice ages had occurred in North America (1807-1873)
United States naturalist (born in Switzerland) who studied fossil fish; recognized geological evidence that ice ages had occurred in North America (1807-1873)
United States naturalist (born in Switzerland) who studied fossil fish; recognized geological evidence that ice ages had occurred in North America (1807-1873)
United States naturalist (born in Switzerland) who studied fossil fish; recognized geological evidence that ice ages had occurred in North America (1807-1873)
United States naturalist (born in Switzerland) who studied fossil fish; recognized geological evidence that ice ages had occurred in North America (1807-1873)
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