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The Mustard Operation

By: Daniella Caudle | Published: Feb 17, 2017

The Mustard Operation is a surgical technique to correct a heart condition called the transposition of the great arteries (TGA). TGA is a birth…

TechnologyMustard, William T., 1914-1987Transposition of Great VesselsHospital for Sick ChildrenCyanosis

Johann Gregor Mendel (1822-1884)

By: Amanda Andrei | Published: Jul 27, 2013

Johann Gregor Mendel studied plants and their patterns of inheritance in Austria during the nineteenth century. Mendel experimented with the pea…

GeneticsMendel's lawPeasBotany, ExperimentalBotany

Anencephaly

By: Jesse King | Published: Feb 13, 2013

Anencephaly is an open neural tube defect, meaning that part of the neural tube does not properly close or that it has reopened during early…

fetal developmentFetus--AbnormalitiesBirth DefectsEmbryologyPregnancy

Inducing Fertilization and Development in Sand Dollars

By: Karen Wellner | Published: Jun 24, 2010

Sand dollars are common marine invertebrates in the phylum Echinodermata and share the same class (Echinoidea) as sea urchins. They have served as…

Sand DollarsFertilizationInvertebrates

Alan Mathison Turing (1912-1954)

By: Julia Damerow | Published: Jun 22, 2010

Alan Mathison Turing was a British mathematician and computer scientist who lived in the early twentieth century. Among important contributions in…

PeopleMorphogenesisBiographyModels

De Formatione Ovi et Pulli (1621), by Girolamo Fabrici

By: Hilary Gilson | Published: Sep 30, 2008

The embryological treatise De formatione ovi et pulli (On the Formation of the Egg and of the Chick) was written by anatomist and embryologist…

LiteraturePublicationsOvaAnatomy
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Albert Ludwig Sigesmund Neisser (1855–1916)

By: Eboni E. Andersun | Published: Jun 03, 2025

Albert Ludwig Sigesmund Neisser was a physician and scientist working in Poland who, in 1879, identified the bacterium that causes gonorrhea. Before…

SyphilisGonorrheaLeprosySexually Transmitted DiseasesBacteria

Sexual Hygiene (1902), by the Alkaloidal Clinic

By: Rainey Horwitz | Published: Mar 21, 2022

In 1902, editors of the medical journal Alkaloidal Clinic Wallace C. Abbott and William Francis Waugh published Sexual Hygiene, a book about normal…

LiteratureSexual HealthSex EducationHygienePublications

Embryonic Sex Differentiation and Sex Hormones (1947), by Carl R. Moore

By: Mary Drago | Published: May 03, 2014

In 1947, Carl Richard Moore, a researcher at the University of Chicago, in Chicago, Illinois, wrote Embryonic Sex Differentiation and Sex Hormones,…

LiteratureEndocrinologyHormones, SexGonadal Steroid HormonesFreemartinism