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Renowned 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…
LiteratureMitosisEndosymbiosisflagellasymbiosisThe Hayflick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only…
CellsCell populationsCell DeathApoptosisCell ProliferationIn February 1953, Linus Pauling and Robert Brainard Corey, two scientists working at the California Institute of Technology in Pasadena, California,…
LiteratureDNAGeneticsX-ray crystallography--TechniqueCrystallography, X-RaySimon Edward Fisher studied the genes that control speech and language in England and the Netherlands in the late twentieth and early twenty-first…
GeneticsWellcome Trust Centre for Human Genetics (Oxford, England)Language AcquisitionTranscription factorsForkhead Transcription FactorsZygote intrafallopian transfer (ZIFT) is an assisted reproductive technology (ART) first used in 1986 to help those who are infertile conceive a…
TechnologyZygote Intrafallopian TransferReproductionFertilizationHuman pluripotent stem cells are valued for their potential to form numerous specialized cells and for their longevity. In the US, where a portion of…
LiteratureKass, LeonStem CellsPublicationsethicsGordon Watkins Douglas researched cervical cancer, breach delivery, and treatment of high blood pressure during pregnancy in the US during the…
GynecologyDiagnosis, NoninvasiveEmbryologyAbortionAbortion services