Template:Selected anniversaries/August 7
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1834: Weaver and merchant Joseph Marie Jacquard dies. He invented the Jacquard loom, an early type of programmable machine.
1958: Canterbury scrying engine reprogrammed to detect and prevent crimes against mathematical constants.
1974: High-wire artist Philippe Petit performs a high wire act between the twin towers of the World Trade Center.
1975: Math photographer Cantor Parabola takes retro-temporal pictures of Philippe Petit's high wire act between the twin towers of the World Trade Center, revealing unexpected correspondences with other timelines.
1976: Viking program: Viking 2 inserted into a 1500 x 33,000 km, 24.6 h orbit around Mars.
2017: Paulson celebrates twenty-first anniversary of Viking 2 entering Mars orbit.