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Plan B is a progestin-only emergency contraceptive pill (ECP) that can be taken within seventy-two hours of unprotected sex in order to prevent an…
TechnologyContraceptionReproductionReproductive RightsWilhelm Pfeffer published his book Osmotische Untersuchungen: Studien Zur Zellmechanik (Osmotic Investigations: Studies on Cell Mechanics) in 1877…
LiteratureOsmosisPlants--Osmotic potentialPlantsPlant cell membranesIn the 1989 case Webster v. Reproductive Health Services, the US Supreme Court upheld the constitutionality of a Missouri law regulating abortion…
LawBirth control clinicsAbortionFamily planning servicesAbortion--Law and legislation--United StatesEdward Donnall Thomas, an American physician and scientist, gained recognition in the scientific community for conducting the first bone marrow…
Stem CellsBiographyRegenerationThe extraembryonic membranes that surround and originate from the embryos of vertebrates such as birds, reptiles, and mammals are crucial to their…
AmniocentesisReproductionFetusJohn von Neumann was a Hungarian mathematician who made important contributions to mathematics, physics, computer science, and the area of artificial…
PeopleReproductionBiographyArthur Earl Walker was a medical researcher and physician who studied the brain and neurosurgery in the United States during the twentieth century.…
NeurologyBrain--Ventricles--SurgeryJohns Hopkins HospitalJohns Hopkins Hospital. Department of MedicineDandy-Walker SyndromeOviraptor philoceratops was a small bird-like dinosaur that lived about seventy-five million years ago, during the late Cretaceous period. In 1923,…
OviraptorDinosaurs--EggsNatural history museumsPaleobiologyEvolutionary paleobiologyThe arterial switch operation, also called the Jatene procedure, is an operation in which surgeons redirect the flow of blood through abnormal hearts…
TechnologyJatene, AdibTransposition of Great VesselsCongenital Heart DiseaseAorta--AbnormalitiesHermann Joseph Muller studied the effects of x-ray radiation on genetic material in the US during the twentieth century. At that time, scientists had…
Muller, H. J. (Hermann Joseph), 1890-1967X-raysRadiationGeneticsMutation