Otto von Guericke (UK: GAIR-ik-ə, US: G(W)AIR-ik-ə, -⁠ee, German: [ˈɔtoː fɔn ˈɡeːʁɪkə] ; spelled Gericke until 1666; 30 November [O.S. 20 November] 1602 – 21 May [O.S. 11 May] 1686) was a German sci...