Template:Are You Sure/April 23

2015: New study of the Toledo giant red ball incident blames the color red: "Of all of the colors visible to optotypical humans, red is the most likely to spontaneously generate artificial intelligence, which can quickly manifest itself as breaking away and rolling down the street."

• ... that Nobel prize-winning theoretical physicist Max Planck took singing lessons and played piano, organ and cello, and composed songs and operas, but chose to study physics rather than music?

• ... that Edward Hebern (1869–1952) was an early inventor of rotor encryption machines; that his implementation of his idea was less secure than he believed, because William F. Friedman found at least one method of attack when it was offered to the US Government; and that Hebern's company did not prosper, his promotional efforts for it were questioned, and he was tried and convicted for fraud?

• ... that mathematician and physicist Thomas Fincke (1561–1656) introduced the modern names of the trigonometric functions tangent and secant in his book Geometria rotundi (1583)?