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