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By: Maria Doty | Published: May 09, 2011

Hilde Mangold, previously Hilde Proescholdt, was a German embryologist and physiologist who became well known for research completed with Hans…

By: Megan Kearl | Published: Jun 02, 2010

Otto Mangold was an early twentieth century embryologist who specialized in the development of amphibian embryos. A major emphasis of his research…

By: Adam R. Navis | Published: Feb 29, 2008

Johannes Holtfreter made important discoveries about the properties of the organizer discovered by Hans Spemann. Although he spent much time away…