In the 1600s, the mayor of Magdeburg [0] stuck a narwhal horn on the skull of a wooly rhino, and thereby convinced Leibniz that unicorns existed. The same mayo

In the 1600s, the mayor of Magdeburg [0] stuck a narwhal horn on the skull of a wooly rhino, and thereby convinced Leibniz that unicorns existed. The same mayor also invented the first vacuum pump. [0] https://en.wikipedia.org/wiki/Otto_von_Guericke https://en.wikipedia.org/wiki/Otto_von_Guericke