In honor of the 50th anniversary of their partnership, Penn & Teller perform a trick of their own on ‘Penn & Teller: Fool Us’ that Penn Jillette calls “the weirdest trick we’ve ever done”
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/physics/entropy/penn-and-teller/youtube.com.md
Concerned about the continuing turmoil in Russia, Euler left St. Petersburg in June 1741 to take up a post at the Berlin Academy, which he had been offered by Frederick the Great of Prussia.