Editing 1930s (section)

==Science and technology==
[[File:Solvay conference 1930.jpg|thumb|[[Solvay Conference]] of 1930, with prominent physicists such as [[Albert Einstein]], [[Werner Heisenberg]], [[Marie Curie]] and [[Enrico Fermi]].]]

===Technology===
Many technological advances occurred in the 1930s, including:
* [[Frank Whittle]] obtained his first patent for the [[turbo-jet engine]] in 1930. He tested his first [[jet engine]] on the ground in 1937.
* On March 8, 1930, the first [[frozen food]]s of [[Clarence Birdseye]] were sold in [[Springfield, Massachusetts]], United States.
* [[Alan Blumlein]] invented the [[stereophonic sound]] in 1931.
* [[Nestlé]] releases the first [[white chocolate]] candy as the [[Milkybar]].;<ref>{{cite web|url=http://www.thenibble.com/zine/archives/best-white-chocolate2.asp#history|title=White Chocolate Made Of|website=thenibble.com|access-date=2 May 2018|url-status=live|archive-url=http://archive.wikiwix.com/cache/20110224090953/http://www.thenibble.com/zine/archives/best-white-chocolate2.asp#history|archive-date=24 February 2011}}</ref>
* [[Ub Iwerks]] produced the first Color Sound Cartoon in 1930, a [[Flip the Frog]] cartoon entitled ''[[Fiddlesticks (1930 film)|Fiddlesticks]]'';
* In 1930, [[Warner Brothers]] released the first All-Talking All-Color wide-screen movie, ''[[Song of the Flame (film)|Song of the Flame]]''; in 1930 alone, Warner Brothers released ten All-Color All-Talking feature movies in [[Technicolor]] and scores of shorts and features with color sequences;
* In 1931 American aviators [[Clyde Edward Pangborn]] and Hugh Herndon, Jr., complete the first [[non-stop flight]] across the Pacific Ocean, flying their plane, ''[[Miss Veedol]]'', from [[Misawa, Aomori|Misawa, Japan]], to [[East Wenatchee, Washington]], in 41½ hours.<ref>{{cite web|title=Pangborn-Herndon Memorial Site|url=http://www.nps.gov/nr//travel/aviation/pan.htm|work=Aviation: From Sand Dunes To Sonic Booms|publisher=[[National Park Service]]|access-date=2012-05-31}}</ref>
* [[Air mail]] service across the Atlantic Ocean began;
* [[Radar]] was invented, known as RDF (Radio Direction Finding), such as in British Patent GB593017 by [[Robert Watson-Watt]] in 1938[[File:Paris expo 1937.jpg|thumb|The Place de Varsovie in [[Paris]] during the [[Exposition Internationale des Arts et Techniques dans la Vie Moderne|World Expo]] in 1937, photographed using newly invented [[Agfacolor]] process.]]
* In 1933, the [[3M]] company marketed [[Scotch Tape]];
* In 1931, [[RCA Victor]] introduced the first long-playing phonograph record.
* In 1935, the British [[London and North Eastern Railway]] introduced the [[A4 Pacific]], designed by [[Nigel Gresley]]. Just three years later, one of these, [[LNER Class A4 4468 Mallard|No. 4468 Mallard]], would become the fastest steam locomotive in the world.
* In 1935, [[Kodachrome]] is invented, being the first color film made by [[Eastman Kodak]].
* In 1936, The first regular [[High-definition television|high-definition]] (then defined as at least 200 lines) television service from the [[BBC]], based at [[Alexandra Palace]] in London, officially begins broadcasting.
* The [[Volkswagen Beetle]], one of the best-selling [[automobile]]s ever produced, had its roots in [[Nazi Germany]] in the late 1930s. Created by [[Ferdinand Porsche]] and his chief designer [[Erwin Komenda]]. The car would prove to be successful, and is still in production today as the [[Volkswagen New Beetle|New Beetle]].
* In 1935, [[Howard Hughes]], flying the H-1, set the landplane [[Flight airspeed record|airspeed record]] of 352&nbsp;mph (566&nbsp;km/h).
* In 1937, flying the same H-1 Racer fitted with longer wings, the ambitious Hughes sets a new [[transcontinental airspeed record]] by flying non-stop from Los Angeles to Newark in 7 hours, 28 minutes, and 25 seconds (beating his own previous record of 9 hours, 27 minutes). His average ground speed during the flight was 322&nbsp;mph (518&nbsp;km/h).<ref>{{Cite web|url=http://www.centennialofflight.net/essay/Explorers_Record_Setters_and_Daredevils/Hughes/EX28.htm|title=Howard R. Hughes, Jr.--The Record Setter|website=centennialofflight.net|access-date=2017-12-24|url-status=live|archive-url=https://web.archive.org/web/20170630210746/http://www.centennialofflight.net/essay/Explorers_Record_Setters_and_Daredevils/Hughes/EX28.htm|archive-date=2017-06-30}}</ref>
* First intercontinental commercial airline flights.
* The [[chocolate chip cookie]] is developed in 1938 by [[Ruth Graves Wakefield]].
* The [[Frying pan (guitar)|Frying Pan]] becomes the first electric [[lap steel guitar]] ever produced.
* [[Edwin Armstrong]] invents wide-band [[frequency modulation]] radio in 1933.
* The [[bass guitar]] is invented by [[Paul Tutmarc]] of Seattle, Washington, in 1936.
* [[EMI]] research team, under [[Isaac Shoenberg]], developed the 405-line (Marconi-EMI system), the first fully electronic television system in 1936.

===Science===
[[File:Pluto in True Color - High-Res.jpg|upright|thumb|The discovery of the dwarf planet [[Pluto]]]]

* In 1930, Astronomer [[Clyde Tombaugh]] discovers [[Pluto]], which goes on to be announced as the ninth planet in the Solar System.
* In 1935, [[Irene Joliot-Curie]] and [[Jean Frederic Joliot]] are awarded the [[Nobel Prize in Chemistry]] for synthesis of new radioactive elements for application in medicine.
* In 1936, Danish seismologist [[Inge Lehmann]] was able to conclude that the Earth had a solid inner core and a molten outer core to explain inconsistencies in seismic wave data from earthquakes
* In 1939, [[Marguerite Perey]], a student of [[Marie Curie]], discovered the element [[francium]] by purifying samples of [[lanthanum]]<ref>{{Cite news |date=2014-12-03 |title=My Great-Great-Aunt Discovered Francium. And It Killed Her. (Published 2014) |url=https://www.nytimes.com/2014/12/07/magazine/my-great-great-aunt-discovered-francium-and-it-killed-her.html |archive-url=http://web.archive.org/web/20240508174947/https://www.nytimes.com/2014/12/07/magazine/my-great-great-aunt-discovered-francium-and-it-killed-her.html |archive-date=2024-05-08 |access-date=2024-12-14 |language=en-US}}</ref>
* In 1939, [[Nuclear fission]] is discovered by [[Otto Hahn]], [[Lise Meitner]] and [[Fritz Strassman]]. [[Albert Einstein]]'s equations form the basis for creation of the atomic bomb.