Template:Are You Sure/December 22

William Blake's monster takes the stage.

• ... that Cesare Cremonini is now remembered as an infamous side actor in the Galileo affair, despite being one of the greatest philosophers of his time?
• ... that mathematician Johann Friedrich Pfaff's work on partial differential equations became part of the theory of differential forms?
• ... that a lecture in 1920 by William Blake's monster ended in a riot, with over fifty thousand fleas released from the Human Flea Circus?