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The Hayflick Limit
By: Zane Bartlett
| Published: Nov 14, 2014
The 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 Proliferation
“A Proposed Structure for the Nucleic Acids” (1953) by Linus Pauling and Robert Brainard Corey
By: Victoria Hernandez
| Published: Aug 26, 2019
In 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-Ray
Simon Edward Fisher (1970-)
By: Kat Fowler
| Published: Apr 27, 2017
Simon 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 Factors
Zygote Intrafallopian Transfer
By: Tian Zhu
| Published: Jan 31, 2011
Zygote intrafallopian transfer (ZIFT) is an assisted reproductive technology (ART) first used in 1986 to help those who are infertile conceive a…
TechnologyZygote Intrafallopian TransferReproductionFertilization
"Alternative Sources of Human Pluripotent Stem Cells" (2005), by Leon Kass and the President’s Council on Bioethics
By: Samuel Philbrick
| Published: Feb 22, 2011
Human 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 CellsPublicationsethics
Gordon Watkins Douglas (1921-2000)
By: Alexis Abboud
| Published: Sep 15, 2014
Gordon Watkins Douglas researched cervical cancer, breach delivery, and treatment of high blood pressure during pregnancy in the US during the…
GynecologyDiagnosis, NoninvasiveEmbryologyAbortionAbortion services
“Sex Limited Inheritance in Drosophila” (1910), by Thomas Hunt Morgan
By: Kevin Gleason
| Published: May 22, 2017
In 1910, Thomas Hunt Morgan performed an experiment at Columbia University, in New York City, New York, that helped identify the role chromosomes…
DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutation
Sheldon Clark Reed (1910-2003)
By: Cassidy Possehl
| Published: Jun 10, 2017
Sheldon Clark Reed helped establish the profession of genetic counseling in the US during the twentieth century. In 1947 Reed coined the term genetic…
Genetic CounselingCystic FibrosisDrosophilaGeneticsHmong Americans
Otto Mangold (1891-1962)
By: Megan Kearl
| Published: Jun 02, 2010
Otto Mangold was an early twentieth century embryologist who specialized in the development of amphibian embryos. A major emphasis of his research…
PeopleOrganizers, EmbryonicBiographyAmphibians
Elizabeth Blackburn, Carol Greider and Jack Szostak's Telomere and Telomerase Experiments (1982-1989)
By: Zane Bartlett
| Published: Mar 24, 2015
Experiments conducted by Elizabeth Blackburn, Carol Greider, and Jack Szostak from 1982 to 1989 provided theories of how the ends of chromosomes,…
TelomereGreider, Carol W.Chromosome replicationTelomeraseDNA