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The Origin of Species: "Chapter Thirteen: Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs" (1859), by Charles R. Darwin
By: M. Elizabeth Barnes
| Published: Jul 11, 2014
Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs is the thirteenth chapter of Charles Darwin's book The Origin of…
LiteratureEvolutionEvolution (Biology)Natural selectionEmbryology
Francis Maitland Balfour (1851-1882)
By: Mark A. Ulett
| Published: Jun 29, 2010
During the 1870s and early 1880s, the British morphologist Francis Maitland Balfour contributed in important ways to the budding field of…
BiographyEvolution
Jane Marion Oppenheimer (1911-1966)
By: Kimberly A. Buettner
| Published: Nov 01, 2007
Jane Marion Oppenheimer, embryologist and historian of science and medicine, was born on 19 September 1911 in Philadelphia, Pennsylvania, to Sylvia…
PeopleBiographyEvolutionhistory
Gavin Rylands de Beer (1899-1972)
By: Megan Kearl
| Published: Jun 02, 2010
Gavin de Beer was an English zoologist known for his contributions to evolution and embryology, in particular for showing the inadequacy of the germ…
PeopleBiographyEvolutionZoology
Ernst Heinrich Philipp August Haeckel (1834-1919)
By: Karen Wellner
| Published: Jun 16, 2010
Ernst Heinrich Philipp August Haeckel was a prominent comparative anatomist and active lecturer in the late nineteenth and early twentieth centuries…
PeopleHaeckel, Ernst, 1834-1919Biological EvolutionBiographyEvolution
Ernst Haeckel's Biogenetic Law (1866)
By: M. Elizabeth Barnes
| Published: May 03, 2014
The biogenetic law is a theory of development and evolution proposed by Ernst Haeckel in Germany in the 1860s. It is one of several recapitulation…
EvolutionDevelopmental BiologyEmbryologyAnatomy, Comparative
Mechanistic Realization of the Turtle Shell
By: Guido Caniglia
| Published: Oct 10, 2011
Turtle morphology is unlike that of any other vertebrate. The uniqueness of the turtle's bodyplan is attributed to the manner in which the turtle's…
TurtlesEvolutionMorphology
Etienne Geoffroy Saint-Hilaire (1772-1844)
By: Valerie Racine
| Published: Aug 05, 2013
Etienne Geoffroy Saint-Hilaire, commonly known as Geoffroy, studied animals, their anatomy and their embryos, and teratogens at the National Museum…
Geoffroy Saint-Hilaire, Etienne, 1772-1844TeratologyZoologyFrench RevolutionHomology theory
David Starr Jordan (1851-1931)
By: Jill Briggs
| Published: Jun 26, 2013
David Starr Jordan studied fish and promoted eugenics in the US during the late nineteenth and early twentieth centuries. In his work, he embraced…
EugenicsEvolutionEmbryosEmbryologyHeredity
Richard Woltereck (1877-1944)
By: B. R. Erick Peirson
| Published: May 13, 2012
Richard Woltereck was a German zoologist and hydrobiologist who studied aquatic animals and extended the concept of Reaktionsnorm (norm of reaction)…
PeopleEvolutionHeredityEmbryologyAquatic animals