1928 in science

Anthropology

• American anthropologist Margaret Mead publishes Coming of Age in Samoa, "a psychological study of primitive youth for Western civilization".

  Archaeology

• The old Canaanite city of Ugarit is rediscovered.

  Biology

• January – Frederick Griffith reports the results of Griffith's experiment, indirectly proving the existence of DNA.
• September 3 – Alexander Fleming, at St Mary's Hospital, London, accidentally rediscovers the antibiotic Penicillin, forgotten since Ernest Duchesne's original discovery in 1896.
• American biogerontologist Raymond Pearl publishes his Rate of Living Hypothesis, proposing that lifespan is shorter in animals with faster metabolisms.

  Chemistry

• The Diels-Alder reaction was first described by German chemists Otto Diels and Kurt Alder in 1928.
• Bubble gum is invented by Walter Diemer in the United States.

  Computer science

• April – Leslie Comrie publishes an article "On the Construction of Tables by Interpolation", describing the use of punched card equipment for interpolating tables of data, and becomes the first to use such equipment for scientific calculations, using Fourier synthesis to compute the principal terms in the motion of the Moon for 1935–2000.

  History of science

• Florian Cajori begins publication of .

  Mathematics

• David Hilbert and Wilhelm Ackermann publish Grundzüge der theoretischen Logik, a pioneering elementary text in first-order logic stating the Entscheidungsproblem.
• John von Neumann publishes Zur Theorie der Gesellschaftsspiele, a text in game theory.

  Medicine

• October 12 – An 'iron lung' medical ventilator designed by Philip Drinker and Louis Agassiz Shaw, Jr., is used for the first time, at Boston Children's Hospital in the United States for treatment of poliomyelitis.
• Dementia pugilistica is first described by forensic pathologist Dr. Harrison Stanford Martland, chief medical examiner of Essex County, New Jersey.

  Physics

• February 28 – C. V. Raman and K. S. Krishnan discover Raman scattering in liquids.
• Paul Dirac proposes the Dirac equation as a relativistic equation of motion for the wavefunction of the electron, leading him to predict the existence of the positron, the electron's antiparticle.

  Technology

• February 8 – British inventor John Logie Baird broadcasts a transatlantic television signal from London to Hartsdale, New York.
• June 11 – Hungarian inventor Kálmán Tihanyi files patents in Germany, the United Kingdom and France for a cathode ray television transmission system.
• July 3
• * British inventor John Logie Baird demonstrates the world's first color television transmission, using scanning discs.
• * Ulster-born engineer Harry Ferguson obtains a British patent for his three-point linkage for tractors.
• July 7 – The first machine-sliced and machine-wrapped loaf of bread is sold in Chillicothe, Missouri, using Otto Frederick Rohwedder's technology.
• September 3 – Philo Farnsworth demonstrates to the Press the world's first working all-electronic television system, employing electronic scanning in both the pickup and display devices.
• December – Completion of the Maurzyce Bridge near Łowicz in central Poland, the world's first road bridge of wholly welded construction, designed by Stefan Bryła.
• The concrete pump is invented by German Max Giese.
• Magnetic tape is invented by German Fritz Pfleumer.

  Publications

• Arthur Eddington publishes the popular text The Nature of the Physical World in the United Kingdom, including a statement of the infinite monkey theorem.

  Awards

• Nobel Prizes
• * Physics – Owen Willans Richardson
• * Chemistry – Adolf Otto Reinhold Windaus
• * Medicine – Charles Jules Henri Nicolle

  Births

• January 4 – Henry T. Lynch, American cancer geneticist.
• January 12 – Gerald Russell, British psychiatrist.
• February 18 – John Ostrom, American paleontologist.
• March 8 – Gerald Bull, Canadian ballistics engineer.
• March 28 – Alexander Grothendieck, German-born French mathematician, pioneer of modern algebraic geometry.
• April 6 – James Watson, American geneticist.
• April 20 – Charles David Keeling, American atmospheric chemist, geochemist and oceanographer.
• April 29 – Heinz Wolff, German-born British bioengineer and science populariser.
• May 2 – Hans Trass, Estonian ecologist and botanist
• May 4 – Bill Mollison, Australian biologist, pioneer of permaculture.
• May 23 – Jean E. Sammet, American computer programmer.
• May 26 – Jack Kevorkian, American pathologist, advocate of euthanasia.
• June 13 – John Forbes Nash, Jr., American mathematician, winner of the Nobel Memorial Prize in Economic Sciences.
• June 28 – Harold Evans, English newspaper editor.
• July 23 – Vera Rubin, née Cooper, American astronomer.
• September 7 – Donald Henderson, American epidemiologist.
• October 7 – Lorna Wing, née Tolchard, English psychiatrist.
• October 25 – Peter Naur, Danish data scientist.
• November 22 – Bill Chaloner, English palaeobotanist.
• December 26 – Martin Cooper, American "father of the mobile phone".
• Wu Xinzhi, Chinese paleoanthropologist.

  Deaths

• February 4 – Hendrik Lorentz, Dutch physicist and Nobel laureate.
• March 19 – David Ferrier, Scottish-born neurologist.
• March 21 – E. Walter Maunder, English astronomer.
• May 21 – Hideyo Noguchi, Japanese bacteriologist.
• August 30 – Wilhelm Wien, German physicist.
• October 29 – John Macintyre, Scottish laryngologist and pioneer radiographer.