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Antoni van Leeuwenhoek was born in Delft, the Netherlands, on 24 October 1632 to Margriet Jacobsdochter van den Berch and Philips Thooniszoon, both…
BiographyMicroscopyFrancesco Redi, son of Florentine physician Cecilia de' Ghinci and Gregorio Redi, was born in Arezzo, Italy, on 18 February 1626. He studied…
BiographyFranklin Paine Mall was born into a farming family in Belle Plaine, Iowa, on 28 September 1862. While he attended a local academy, an influential…
BiographyEducationAlthough educated as a scientist who studied with both August Weismann and Ernst Heinrich Haeckel, Hans Adolf Eduard Driesch was first employed as a…
BiographySea UrchinsWilhelm August Oscar Hertwig contributed to embryology through his studies of cells in development and his discovery that only one spermatozoon is…
PeopleFertilizationBiographySpermOvaGeorge Linius Streeter was born on 12 January 1873 in Johnstown, New York, to Hannah Green Anthony and George Austin Streeter. He completed his…
PeopleBiographyHuman DevelopmentLazzaro Spallanzani's imaginative application of experimental methods, mastery of microscopy, and wide interests led him to significant contributions…
PeopleRegenerationBiographyFlorence Rena Sabin had successful careers as both a researcher and public health reformer. When Johns Hopkins University Medical School opened,…
PeopleBiographypublic healthEducationJoseph Needham was an embryologist and biochemist who is most noted in science for his studies on induction in developing embryos. Needham worked…
PeopleEmbryonic InductionBiographyAs one of the first to work at the Carnegie Institution of Washington Department of Embryology, Warren Harmon Lewis made a number of contributions to…
PeopleBiographyEducationCarnegie Institution of Washington