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1920
"Great Debate" between H. Shapely and H. Curtis on the nature of spiral galaxies
Saha, ionization equation
Lowenheum-Skolem theorem, Skolem paradox
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2 January 1920 Birth of George Howard Herbig
13 January 1920 Birth of Lev Pavlovich Rapoport
16 February 1920 Death of Paul Friedrich Ferdinand Kempf in Potsdam, Germany
11 March 1920 Birth of Nicolaas Bloembergen
26 April 1920 Death of Srinivasa Ramanujan
10 July 1920 Birth of Owen Chamberlain
29 September 1920 Birth of Peter Dennis Mitchell
2 December 1920, Birth of William de Wiveleslie Abney in Folkestone, Kent, England
6 December 1920 Birth of George Porter
1920 Birth of Chusiro Hayashi
1920 Birth of Rosalind (Elsie) Franklin
1920 Birth of Thomas Gold
1920 Birth of Keith R Symon
1920 Birth of Sir John Adams
1920 Birth of Mervyn Hine
1920 Birth of Hugh Hereward
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Nobel Prize
Physics to Charles Edouard Guillaume in recognition of the service he has rendered to precision measurements in Physics by his discovery of anomalies in nickel steel alloys.
Chemistry to Walther Hermann Nernst "in recognition of his work in thermochemistry"
Physiology or Medicine to Schack August Steenberg Krogh "for his discovery of the capillary motor regulating mechanism"
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