The temperature on January 25, 1953 was between 0.1 °C and 3.8 °C and averaged 1.4 °C. There was 1.8 mm of rain during 3.0 hours. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
February 28 » James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA; the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2).
April 13 » CIA director Allen Dulles launches the mind-control program Project MKUltra.
April 25 » Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA.
June 30 » The first Chevrolet Corvette rolls off the assembly line in Flint, Michigan.
October 30 » President Eisenhower approves the top-secret document NSC 162/2 concerning the maintenance of a strong nuclear deterrent force against the Soviet Union.
November 9 » Cambodia gains independence from France.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P8953.php : accessed January 5, 2026), "Johnson Hellen (1870-1953)".
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