[CM] there's a use for tanh!?

[Bill Schottstaedt]

> Actually ... that sounds interesting ... can you post a link to the 
> article about synchronizing fireflies? 

It's from CMJ, but not the one you'd think -- College Mathematics Journal,
vol 37 no 3 May 2006, "Fireflies flashing in unison" by Ying Zhou, 
Walter Gall, and Karen Nabb.  The "references" include numerous
other articles on the phenomenon, but I don't see any web link.