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In 1985, a Canadian historian, Robin Yates, saw a sculpture on the wall of a Buddhist cave temple, depicting a demon holding a hand-held bombard. The muzzle seems to have a blast and flames coming from it, which some believe is proof of a super gun. Yates examined the cave and believed the drawings dated from the late 12th century. [101]
Johannes Gensfleisch zur Laden zum Gutenberg [a] (c. 1393–1406 – 3 February 1468) was a German inventor and craftsman who invented the movable-type printing press.Though movable type was already in use in East Asia, Gutenberg's invention of the printing press [2] enabled a much faster rate of printing.
In China the Cosmic Engine, a 10-metre (33 ft) clock tower built by Su Song in Kaifeng, China, in 1088 CE, featured mechanical mannequins that chimed the hours, ringing gongs or bells among other devices. [17] Feats of automation continued into the Tang dynasty. Daifeng Ma built an automated dresser servant for the queen. [18]
Gottfried Wilhelm Leibniz (or Leibnitz; [a] 1 July 1646 [O.S. 21 June] – 14 November 1716) was a German polymath active as a mathematician, philosopher, scientist and diplomat who is credited, alongside Sir Isaac Newton, with the creation of calculus in addition to many other branches of mathematics, such as binary arithmetic and statistics.
In Diocletian's edict on price controls (301 AD), a maximum price for skilled slaves aged 16–40 is fixed as up to double that of an unskilled slave, which was the equivalent of 3 tons of wheat for a male and 2.5 for a female. [356] Actual pricing would differ by time and place. [357]
Atlanta's housing market has also struggled, with home prices dropping by 2.1% in January 2012, reaching levels not seen since 1996. Compared with a year earlier, the average home price in Atlanta plummeted to 17.3% in February 2012, thus becoming the largest annual drop in the history of the index for any American or global city.