http://www.indiana.edu/~geol105/images/gaia_chapter_4/milankovitch.htm https://www.sciencedaily.com/releases/2013/08/130807134127.htm but wonder if it is 23.000 , 41.000 or 100.000 years cycle the one that is related with the honeybee ;) How old are the honeybees? Old enough to have gone through the precession cycle getting on for a thousand times! Chris *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html