Editing 1920s (section)

==Science and technology==
===Technology===
* [[John Logie Baird]] invents the first working [[mechanical television]] system (1925). In 1928, he invents and demonstrates the first [[color television]].
* [[Warner Brothers]] produces the first movie with a soundtrack ''[[Don Juan (1926 film)|Don Juan]]'' in 1926, followed by the first Part-Talkie ''[[The Jazz Singer]]'' in 1927, the first All-Talking movie ''[[Lights of New York (1928 film)|Lights of New York]]'' in 1928 and the first All-Color All-Talking movie ''[[On with the Show (1929 film)|On with the Show]]'', 1929. [[Silent film]]s start giving way to [[sound film]]s. By 1936, the transition phase arguably ends, with ''[[Modern Times (film)|Modern Times]]'' being the last notable silent film.
* [[Karl Ferdinand Braun]] invents the modern electronic [[cathode-ray tube]] in 1897. The CRT became a commercial product in 1922.
* [[Record labels|Record companies]] (such as [[Victor Talking Machine Company|Victor]], [[Brunswick Records|Brunswick]] and [[Columbia Records|Columbia]]) introduce an electrical recording process on their phonograph records in 1925 (that had been developed by [[Western Electric]]), resulting in a more lifelike sound.
* The first [[Razor|electric razor]] is patented in 1928 by the American manufacturer Col. [[Jacob Schick]].
* The first selective [[Jukebox]]es being introduced in 1927 by the Automated Musical Instrument Company.
* [[Harold Stephen Black]] revolutionizes the field of applied electronics by inventing the [[negative feedback amplifier]] in 1927.
* [[Clarence Birdseye]] invents a process for [[frozen food]] in 1925.
* [[Robert Goddard]] makes the first flight of a [[Liquid-propellant rocket|liquid-fueled rocket]] in 1926.
* [[Charles Lindbergh]] becomes the first person to fly solo across the Atlantic Ocean (May 20–21, 1927), nonstop from [[Long Island|New York]] to [[Paris]].<ref>{{Cite web |title=Lindbergh's Transatlantic Flight: New York to Paris Timeline |url=http://www.charleslindbergh.com/history/timeline.asp |archive-url=https://web.archive.org/web/20221113030546/http://www.charleslindbergh.com/history/timeline.asp |archive-date=November 13, 2022 |access-date=2022-11-13 |website=charleslindbergh.com}}</ref>

<gallery widths="190" perrow="5">
File:Goddard and Rocket.jpg|[[Robert Goddard]] and his rocket, 1926
File:Telefon, Nordisk familjebok.png|1920s phone
File:Campbell_Thompson.jpg|[[Thompson submachine gun]] (1921 model)
</gallery>

===Science===
* Howard Carter opens the innermost shrine of King [[Tutankhamun]]'s tomb near Luxor, Egypt, 1922.
* Insulin was first used as a medication in Canada by [[Charles Best (medical scientist)|Charles Best]] and [[Frederick Banting]] in 1922.<ref name="Discovery">{{cite web |title=Frederick Banting, Charles Best, James Collip, and John Macleod |url=https://www.sciencehistory.org/historical-profile/frederick-banting-charles-best-james-collip-and-john-macleod |website=Science History Institute |access-date=22 August 2018 |date=June 2016 |archive-date=1 December 2018 |archive-url=https://web.archive.org/web/20181201105332/https://www.sciencehistory.org/historical-profile/frederick-banting-charles-best-james-collip-and-john-macleod |url-status=live }}</ref>
* In 1928, Alexander Fleming discovers [[penicillin]].

<gallery widths="190" perrow="5">
File:Synthetic_Production_of_Penicillin_TR1468.jpg|In 1928, Alexander Fleming discovers penicillin.
File:Tuts Tomb Opened.JPG|Howard Carter opens the innermost shrine of King Tutankhamun's tomb near Luxor, Egypt, 1922.
</gallery>