@640e31bb @0b13872d I'd heard of it before I got to uni, probably mainly because my grandmother used to grow Michaelmas daisies: and right on cue, here is one.

https://media.mas.to/masto-public/media_attachments/files/111/148/783/736/174/054/original/cb9b75e6c9192587.jpg 

 @2d98ff6b I have a not-very-well-deserved writing credit on a huge computer algebra system written in Lisp.  It is a nifty language.