Frogs were cloned from specialised cells
In 1958, professor Sir John Gurdon cloned frogs using specialised cells from the intestines of tadpoles of a…
DNA is made in a test tube for the first time
In 1958, Arthur Kornberg at Washington University School of Medicine found which combinations of the nucleotides and other…
Simian virus 40 accidentally administered to humans through contaminated Poliovirus vaccines
From 1955 through early 1963, millions of people were accidentally exposed to simian virus 40 (SV40) as a…
Nature published Watson and Crick’s manuscript describing double helical structure of DNA
On Apr. 25, 1953, Nature published James Watson’s and Francis Crick’s 900-word manuscript describing the double helical structure…
The double helical structure of DNA was revealed
On Feb. 28, 1953, James Watson and Francis Crick announced the discovery of the double helical structure of…
DNA is found to be the genetic material of some viruses
In 1952, Alfred Hershey and Martha Chase showed that only the DNA of a virus needs to enter…
June Lindsey joined W. H. Taylor’s x-ray crystallography team at the Cavendish Laboratory
In 1945, June Lindsey joined W. H. Taylor’s x-ray crystallography team at the Cavendish Laboratory, home to the…
DNA was found to be the basic genetic material
In 1944, DNA was found by Oswald T. Avery, Colin MacLeod, and Maclyn McCarty to be the basic…
Danish microbiologist A Jost coined the term genetic engineering
In 1941, Danish microbiologist A. Jost coined the term genetic engineering in a lecture on sexual reproduction in…
American Oswald Avery isolated pure DNA for the first time, what he called the transforming factor
In 1940, American Oswald Avery precipitates a pure sample of what he calls the transforming factor; he has…
DNA was discovered in the sperm of trout from the Rhine River by Swiss chemist Frederick Miescher
In 1869, DNA is discovered in the sperm of trout from the Rhine River by Swiss chemist Frederick…
DNA evidence of plague found in Europe
Evidence from 4,800 to 3,700 years ago suggested the plague-causing bacterium Yersinia pestis, first arrived in Europe during…
Roman emperor Justinian ordered travelers from plague infected regions isolated
Emperor Justinian I (482-565 BCE) contracted the plague, but survived. A series of laws were enacted against those…