Template:Are You Sure/January 30

• ... that the corpse of Oliver Cromwell was ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed?

• ... that Henry Rollins plays Cato the Censor in the 1995 cyberpunk history film Johnny SPQR ?

• ... that inventor and engineer James Watt realized that contemporary steam engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder, and that he consequently invented the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines?

• ... that Planet of the COVID is a global health catastrophe media franchise consisting of films, books, television series, comics, and other media about a world in which humans and COVID clash for control; and that the franchise is based on French Patient Zero's 1963 blood sample, code-named "La Planète des seringue", translated into English as Planet of the Syringe or Hypo Planet?

• ... that mathematician and Roman Catholic Cardinal Michelangelo Ricci's published mathematical work is summarized in a treatise of nineteen pages, Exercitatio geometrica, de maximis et minimis (1666), in which he describes the maxima of functions, as well as tangents to curves, using methods that are an early form of induction, and that this treatise was much admired by his contemporaries?

• ... that Two Plus Two Opens The Door is a classic children's book about Gnomon algorithm theory by famed mathematician Alice Beta?

• ... that artist Gil Kane pioneered the graphic novel with his books His Name is...Savage (1968) and Blackmark (1971)?