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John Langdon Down studied medicine in England in the nineteenth century and was one of the first people to develop a complete description of the…
Down syndromeDevelopmental DisabilitiesPartial Trisomy 21 Down SyndromeTrisomyPartial TrisomyAdib Jatene in Brazil was the first surgeon to successfully perform the arterial switch operation in 1975. The operation corrected a heart condition…
Heart--SurgeryTransposition of Great VesselsCongenital Heart DiseaseAorta--AbnormalitiesPulmonary artery--AbnormalitiesIn 1944, Oswald Avery, Colin MacLeod, and Maclyn McCarty published an article in which they concluded that genes, or molecules that dictate how…
LiteratureTransformation, BacterialBacterial TransformationStreptococcus pneumoniaeBacterial geneticsIn 2001, Yale University Press published Frederic Lawrence Holmes' book, Meselson, Stahl, and the Replication of DNA: A History of "The Most…
LiteratureWatson, James D., 1928-Crick, Francis, 1916-2004Marine Biological Laboratory (Woods Hole, Mass.)DNA ReplicationEmil Kraepelin was a physician who studied people with mental illness in the late nineteenth and early twentieth centuries in modern-day Germany.…
Comparative psychiatryMental illnessMental DisordersDual diagnosisMental illness--BibliographyRenowned physician and scientist William Harvey is best known for his accurate description of how blood circulates through the body. While his…
PeopleBlood CirculationBiographycirculationIn 1904, physician William Henry Walling published Sexology, a family medicine reference book. In his book, Walling proposed that his guidance would…
LiteratureMasturbationCoitus interruptusSexSexologyCharles Manning Child designed an experimental test, the susceptibility assay, to measure the effects of different toxins on developmental processes…
TechnologyChild, Charles Manning, 1869-1954OvadifferentiationOn the Origin of Mitosing Cells by Lynn Sagan appeared in the March 1967 edition of the Journal of Theoretical Biology. At the time the article was…
LiteratureMitosisEndosymbiosisflagellasymbiosis