1944 in science

Astronomy

• Hendrik van de Hulst predicts the 21 cm hyperfine line of neutral interstellar hydrogen.

Biology

• February 1 – Oswald T. Avery and colleagues publish the Avery–MacLeod–McCarty experiment showing that a DNA molecule can carry an inheritable trait to a living organism. This is important because many biologists thought that proteins were the hereditary material and nucleic acids too simple chemically to serve as genetic storage molecules.
• The lipopolysaccharide character of enteric endotoxins is elucidated by M. J. Shear.
• Erwin Schrödinger publishes What is Life?, containing conceptual discussion of the genetic code and of negentropy.
• Donald Griffin with G. W. Pierce demonstrate that bats use high-frequency sound in a technique which Griffin describes as echolocation.
• Last known evidence for existence of the Asiatic lion in the wild in Iran.

Chemistry

• February – Lars Onsager publishes the exact solution to the two-dimensional Ising model.
• Americium discovered by Glenn T. Seaborg, ''et al.''

Computer science

• August 7 – IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator, best known as the Harvard Mark I.

Geology

• March 18 – Last eruption of Mount Vesuvius.

History of science

• November 4 – The Whipple Museum of the History of Science is established when Robert Whipple presents his collection of scientific instruments to the University of Cambridge, England.
• C. Doris Hellman publishes her Columbia University thesis The Comet of 1577: Its Place in the History of Astronomy.

Mathematics

• John von Neumann and Oskar Morgenstern's book Theory of Games and Economic Behavior is published by Princeton University Press.

Medicine

• November 19 – Minnesota Starvation Experiment begins.
• Hans Asperger describes Asperger syndrome.
• David S. Sheridan invents the disposable plastic tracheal tube catheter.
• Dorothea and Alexander Leighton's book Navajo at the Door is "the earliest example of applied medical anthropology".

Meteorology

• June 5 – Group Captain James Stagg correctly forecasts a brief improvement in weather conditions over the English Channel which permits the following day's Normandy landings to take place.
• August 6 – Ball lightning observed in Uppsala, Sweden.

Physics

• November 6 – Hanford Site in Washington (state) produces its first plutonium.

Technology

• March 27 – In Sweden, Ruben Rausing patents Erik Wallenberg's method of packaging milk in paper, origin of the company Tetra Pak.
• June 13 – First operational use of the German V-1 flying bomb, the first operational cruise missile, containing a gyroscope guidance system and propelled by a simple pulsejet engine.
• September 8 – First operational use of the German V-2 rocket, the first ballistic missile. On June 20 one has become the first man-made object to cross the Kármán line and reach the edge of space.
• December 9 – First flight of the Heinkel He 162 Volksjäger, the second jet engined fighter aircraft to be introduced by the Luftwaffe in World War II.
• First operational use of a snorkel on a submarine.

Awards

• Nobel Prizes
• * Physics – Isidor Isaac Rabi
• * Chemistry – Otto Hahn
• * Medicine – Joseph Erlanger, Herbert Spencer Gasser

Births

• February 8 – Howard Dalton, English microbiologist.
• February 15 – Sigurd Hofmann, German physicist.
• March 7 – Michael Rosbash, American geneticist and chronobiologist, recipient of the Nobel Prize in Physiology or Medicine.
• June 1 – Colin Blakemore, English neurobiologist.
• June 5 – Whitfield Diffie, American cryptographer.
• June 6 – Phillip Allen Sharp, American geneticist and molecular biologist, recipient of the Nobel Prize in Physiology or Medicine.
• June 22 – Gérard Mourou, French electrical engineer, recipient of the Nobel Prize in Physics.
• July 13 – Ernő Rubik, Hungarian inventor and architect.
• August 24 – Gregory Jarvis, American astronaut.
• October 11 – William T. Greenough, American neuroscientist.
• October 16 – Elizabeth Loftus, American psychologist.
• October 21 – Jean-Pierre Sauvage, French coordination chemist, recipient of the Nobel Prize in Chemistry.
• December 19 – Richard Leakey, Kenyan palaeoanthropologist.
• December 28 – Kary Mullis, American biochemist, recipient of the Nobel Prize in Chemistry.

Deaths

• January 19 – Emily Winifred Dickson, British gynaecologist.
• January 20 – James McKeen Cattell, American psychologist.
• February 8 – Bernard Sachs, American neurologist.
• March – John R. F. Jeffreys, British mathematician and cryptanalysist.
• March 2 – Ida Maclean, English biochemist.
• March 5 – Ernst Cohen, Dutch Jewish chemist.
• March 29 – Grace Chisholm Young, English mathematician.
• April 16 – Percy Lane Oliver, British pioneer of voluntary blood donation
• August 23 – Margarete Zuelzer, German Jewish microbiologist.
• June 18 – Harry Fielding Reid, American geophysicist.
• July 25 – Jakob Johann von Uexküll, Baltic German pioneer of biosemiotics.
• November 2 – Thomas Midgley Jr., American chemist and inventor.
• November 22 – Sir Arthur Eddington, English astrophysicist.