Template:Selected anniversaries/July 20
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1562: Didacus automaton develops self-awareness, invents new class of Gnomon algorithm functions.
1937: Businessman and inventor Guglielmo Marconi dies. He shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".
1889: Mark Twain warns public about the supervillain Abomynous.
1977: Project MKUltra (nonfiction): The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind-control experiments.