Template:Selected anniversaries/February 27
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1637: Astronomer Jeremiah Horrocks uses scrying engine techniques to pre-visualize the transit of Venus.
1735: Physician, satirist, and polymath John Arbuthnot dies. He invented the figure of John Bull.
1854: Mathematician Leopold Kronecker discovers invents new type of scrying engine.
1940: Martin Kamen and Sam Ruben discover carbon-14.
1967: Tokens harvested from Diagramaceous soil used to detect and prevent crimes against mathematical constants.