An interesting take on another form of light pollution. http://news.bbc.co.uk/2/hi/science/nature/7821298.stm Phil S. "To consider the Earth the only populated world in infinite space is as absurd as to assert that in an entire field sown with millet only one grain will grow." Metrodorus (d.277) -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.