2 nov 1920 ano - Radio

Descrição:

Radio makes its way into consumer homes, and revolutionizes the way information is shared. The first radio station is KDKA in Pittsburgh. The first broadcast is on in the evening of Nov. 2, 1920.

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image:
http://www.wtip.org/sites/default/files/images/1930ent2.jpg

https://www.britannica.com/topic/KDKA

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