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Leonard Colebrook (1883–1967)
By: Safiya Shaikh
| Published: May 25, 2017
Leonard Colebrook was a physician who researched bacteria and infections in England during the twentieth century. In 1936, Colebrook deployed the…
BacteriaInfectionsPuerperal septicemiaChildbirthBurn care units
Maxine Frank Singer (1931–2024)
By: Abigail Cave
| Published: Dec 06, 2024
Maxine Frank Singer was a researcher who studied molecular biology and genetics in the United States during the twentieth and twenty-first centuries…
Genetic CodeLong Interspersed Nucleotide ElementsGenetic EngineeringGenetic recombinationAsilomar Conference Grounds
Harvey Leroy Karman (1924–2008)
By: Rainey Horwitz
| Published: Jul 18, 2017
Harvey Karman was an abortionist, inventor, and activist for safe abortion techniques in the US during the twentieth century. Karman developed the…
AbortionMenstrual regulationReproductive RightsLate-term abortionInternational Planned Parenthood Federation
Study of Fossilized Massospondylus Dinosaur Embryos from South Africa (1978-2012)
By: Madison Paige
| Published: Mar 31, 2015
In 1978, James Kitching discovered two dinosaur embryos in a road-cut talus at Roodraai (Red Bend) in Golden Gate Highlands National Park, South…
ContextDinosaursDinosaurs--EggsMassospondylus carinatusMassospondylus
"Mitochondrial DNA and Human Evolution" (1987), by Rebecca Louise Cann, Mark Stoneking, and Allan Charles Wilson
By: Dorothy R. Haskett
| Published: Oct 10, 2014
In 1987 Rebecca Louise Cann, Mark Stoneking, and Allan Charles Wilson published Mitochondrial DNA and Human Evolution in the journal Nature. The…
LiteratureMitochondriaHuman EvolutionEvolutionHomo sapiens
"Sheep Cloned by Nuclear Transfer from a Cultured Cell Line" (1996), by Keith Campbell, Jim McWhir, William Ritchie, and Ian Wilmut
By: Zane Bartlett
| Published: Sep 19, 2014
In 1995 and 1996, researchers at the Roslin Institute in Edinburgh, Scotland, cloned mammals for the first time. Keith Campbell, Jim McWhir, William…
CloningClone CellsCloning, MolecularCloning, OrganismExperiments
Paul Kammerer (1880-1926)
By: Federica Turriziani Colonna
| Published: Nov 25, 2014
Paul Kammerer conducted experiments on amphibians and marine animals at the Vivarium, a research institute in Vienna, Austria, in the early twentieth…
Kammerer, Paul, 1880-1926Kammerer, Paul, 1880-1926. Streitfrage der Vererbung erworbener Eigenschaften. EnglishInheritance of acquired charactersAdaptationMidwife toads
Michael R. Harrison (1943– )
By: Risa Aria Schnebly, Brianna Ellis
| Published: Aug 04, 2021
Michael R. Harrison worked as a pediatric surgeon in the US throughout the late-twentieth century and performed many fetal surgeries, including one…
Birth DefectsAbnormalities, HumanPediatric surgeonsMyelomeningoceleSpinal Dysraphism
The Debate over DNA Replication Before the Meselson-Stahl Experiment (1953–1957)
By: Victoria Hernandez
| Published: Jan 03, 2018
Between 1953 and 1957, before the Meselson-Stahl experiment verified semi-conservative replication of DNA, scientists debated how DNA replicated. In…
ChromosomesCalifornia Institute of TechnologyCold Spring Harbor LaboratoryDNA Replication
Telomerase in Human Development
By: Zane Bartlett
| Published: Mar 23, 2015
Telomerase is an enzyme that regulates the lengths of telomeres in the cells of many organisms, and in humans it begins to function int the early…
TelomeraseTelomereDNAMolecular BiologySomatic embryogenesis