With all the pubcasting 40th anniversaries this year, we couldn’t let this one pass unnoticed. Yes, for the 40th year, Wisconsin Public Television will offer “Once Upon a Christmas Cheery in the Lab of Shakhashiri,” hosted by University of Wisconsin-Madison chemistry professor Bassam Shakhashiri. Tickets to the taping this weekend were gone within a few days; broadcasts on WPT will be Dec. 21, 24 and 28. The special runs on stations nationwide, so don’t forget those magic words: Check your local listings.