Happy Mole Day!

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:

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