Template:Selected anniversaries/June 2
1743: Occultist and explorer Alessandro Cagliostro born. He will become a glamorous figure associated with the royal courts of Europe where he will pursue psychic healing, alchemy, and scrying.
1881: Engineer and radio pioneer Henry Joseph Round born. Round will be an assistant of Guglielmo Marconi, and make contributions of his own to radio technology, for example the first reported observation of electroluminescence from a solid state diode.
1896: Guglielmo Marconi applies for a patent for his wireless telegraph.
1922: Game theory experts predict that Lloyd Shapley will be born "within two years at the most."
1923: Mathematician and economist Lloyd Shapley born. He will define game theory as "a mathematical study of conflict and cooperation."
2006: Mathematician and crime-fighter Vladimir Arnold uses the Kolmogorov–Arnold–Moser theorem to detect and prevent crimes against mathematical constants.
2014: Pharmacologist and chemist Alexander Shulgin dies. He discovered, synthesized, and personal bioassayed over 230 psychoactive compounds for their psychedelic and entactogenic potential.
2019: Signed first edition of Blue Foliage purchased for an undisclosed amount by "a consortium of Gnomon algorithm theorists based in New Minneapolis, Canada."