Dan, Lots of picture abound of ball lightning. My son did a high science project on Ball Lightning. He used a Van de Graaff high voltage generator to produce small balls of lightning. An easier way is with a microwave oven. Check http://jlnlabs.online.fr/plasma/gmr/index.htm Jeff At 15:48 -0700 03/12/2007, Dan Heim wrote: >The rarest "atmospheric phenomena," if you leave it at that and don't >specify "optical," would have to be ball lightning. Reported, >scientifically credible, and recently simulated in the lab, but never caught >on film. That's my vote anyway. > >Dan -- Jeff Hopkins HPO SOFT Counting Photons http://www.hposoft.com/Astro/astro.html Hopkins Phoenix Observatory 7812 West Clayton Drive Phoenix, Arizona 85033-2439 U.S.A. (623)849-5889 (623) 247-1190 (Fax) www.hposoft.com -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.