Template:Selected anniversaries/July 4
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1900: Physicist and academic Ukichiro Nakaya born. He will create the first artificial snowflakes.
1951: Physicist and engineer William Shockley announces the invention of the junction transistor.
1983: Physician, confidence trickster, and suspected serial killer John Bodkin Adams dies.
1998: Signed first edition of Leonardo Draws Clock Head sells for one and a half million dollars.
2005: The Deep Impact collider hits the comet Tempel 1.
2017: Outbreak of Geometrical frustration exposes new class of crimes against mathematical constants.