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"The Limited In Vitro Lifetime of Human Diploid Cell Strains" (1964), by Leonard Hayflick
By: Zane Bartlett
| Published: Feb 11, 2017
Leonard Hayflick in the US during the early 1960s showed that normal populations of embryonic cells divide a finite number of times. He published his…
Cell DivisionBiology, ExperimentalCells, CulturedEmbryo Culture Techniquescell aging
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
Somatic Cell Nuclear Transfer in Mammals (1938-2013)
By: Zane Bartlett
| Published: Nov 04, 2014
In the second half of the twentieth century, scientists learned how to clone organisms in some species of mammals. Scientists have applied somatic…
CloningCell nuclei--TransplantationSpemann, Hans, 1869-1941Genetic Engineering
Apoptosis in Embryonic Development
By: Zane Bartlett
| Published: Jun 08, 2017
Apoptosis, or programmed cell death, is a mechanism in embryonic development that occurs naturally in organisms. Apoptosis is a different process…
ApoptosisGenetic regulationCaenorhabditis elegansCellsGerm Cells
Keith Henry Stockman Campbell (1954-2012)
By: Zane Bartlett
| Published: Jun 27, 2014
Keith Henry Stockman Campbell studied embryo growth and cell differentiation during the twentieth and twenty-first centuries in the UK. In 1995,…
Campbell, Keith, 1954-2012Wilmut, IanCloningStem CellsFibroblasts