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Leonard Hayflick (1928- )
By: Zane Bartlett
| Published: Jul 20, 2014
Leonard Hayflick studied the processes by which cells age during the twentieth and twenty-first centuries in the United States. In 1961 at the Wistar…
PeopleCellsCell populationsCell DeathApoptosis
Lynn Petra Alexander Sagan Margulis (1938-2011)
By: Dorothy Regan Haskett
| Published: Mar 23, 2014
Lynn Petra Alexander Sagan Margulis was an American biologist, whose work in the mid-twentieth century focused on cells living together in a mutually…
Eukaryotic cellsMitosissymbiosisMitochondriaMicroorganisms--Evolution
James Marion Sims (1813-1883)
By: Amanda Andrei
| Published: Apr 08, 2013
James Marion Sims developed a surgical cure for ruptures of the wall separating the bladder from the vagina during labor, ruptures called vesico-…
PeopleSims, J. Marion (James Marion), 1813-1883Speculum (Medicine)Fistula, Vesico-vaginalSurgery
The Jackson Laboratory
By: Christina Raup
| Published: Jul 01, 2010
The Roscoe B. Jackson Laboratory, known commonly in the scientific field as the Jackson Laboratory, was founded by Clarence Cook Little in May 1929.…
OrganizationOrganizationsLaboratoriesMiceGenetics
Lennart Nilsson (1922- )
By: Olivia Conley
| Published: Jun 24, 2010
Lennart Nilsson is a world-renowned photojournalist recognized for his exploratory images of the inside of the human body. Throughout his career,…
PeopleReproductionBiographyHuman DevelopmentMorphology
Alexis Carrel's Tissue Culture Techniques
By: Lijing Jiang
| Published: Jun 18, 2010
Alexis Carrel, the prominent French surgeon, biologist, and 1912 Nobel Prize laureate for Physiology or Medicine, was one of the pioneers in…
TechnologyCarrel, Alexis, 1873-1944Tissue Culture TechniquesTissue culture
Vasectomy for Male Sterilization
By: Cole Nichols
| Published: Jun 03, 2024
A vasectomy is a surgery that works to inhibit reproduction by interrupting the passage of sperm through the vas deferens, a tube in the male…
VasectomyVasovasostomyVasectomy ReversalEugenicsSterilization, Reproductive
"Risks and Benefits of Estrogen Plus Progestin in Healthy, Postmenopausal Women: Principal Results from the Women's Health Initiative Randomized Controlled Trial" (2002), by Jacques Rossouw et al.
By: Alexis Darby
| Published: Aug 08, 2017
In 2002, the Writing Group for the Women's Health Initiative Investigators published the article Risks and Benefits of Estrogen Plus Progestin in…
LiteratureMenopauseosteoporosispostmenopauseEstrogen Replacement Therapy
David Wildt's Domestic Cat and Cheetah Experiments (1978-1983)
By: Caroline Appleton
| Published: Dec 19, 2011
David Wildt's cheetah (Acinonyx jubatus) research from 1978-1983 became the foundation for the use of embryological techniques in endangered species…
Endangered SpeciesExperimentsCatsFertility
The Sex Education of Children: A Book for Parents (1931), by Mary Ware Dennett
By: Malladi Lakshmeeramya
| Published: May 24, 2017
Mary Coffin Ware Dennett, a supporter of sex education for children in the US in the early twentieth century, wrote The Sex Education of Children: A…
LiteratureCommunication in reproductive healthSex EducationSex instruction for youthSex instruction--United States