Foucault’s pendulum in the Panthéon in Paris is a physics experiment to demonstrate the rotation of the earth. Léon Foucault was born on this day in 1819, so 200 years today. Happy birthday. Foucault would have been a medical doctor until he discovered he had a phobia for blood. Medicine’s loss was physics gain.
Foucault’s Pendulum is also the title of a great novel by Umberto Eco published in 1988 which pokes fun at conspiracy theorists of the Holy Grail, Knight Templars, the Holy Family and goes on to demonstrate how these conspiracies are preposterous but can be tweaked and prodded to make them believable. It is the antidote to the Da Vinci Code.