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Otto Mangold was an early twentieth century embryologist who specialized in the development of amphibian embryos. A major emphasis of his research…
PeopleOrganizers, EmbryonicBiographyAmphibiansJohn Spangler Nicholas, an American biologist, was born on 10 March 1895 in Allegheny, Pennsylvania. He was the only child of Elizabeth Ellen…
PeopleBiographyMammalsAmphibiansGustav Jacob Born was an experimental embryologist whose original work with amphibians served as the platform for his wax-plate method of embryo…
PeopleTransplantationBiographyAmphibians