No, I’m not posting another animal-related message today. Previously I announced two nerd holidays here: Pi Day (March 14) and First Contact Day (April 5). Now I have learned that today is a third one. It commemorates the discovery made in chemistry of how many atoms are required to make up a gram of a substance, times that element or compound’s atomic weight.
Actually, Mole Day does not encompass all of 10/23, but runs from 6:02 AM to 6:02 PM. Readers who remember Avogadro’s number will get it. Whether or not you do, here is a song about the Italian who figured out the number: