In reply to Jones Beene's message of Wed, 3 Sep 2008 05:53:13 -0700 (PDT): Hi, [snip] >OK - but then what about the situation with our moon or Mars -- with almost no >atmosphere and a dense solid core to absorb cosmic rays ?
This is an excellent point, and I concede. You have put my mind at rest. :) Regards, Robin van Spaandonk <[EMAIL PROTECTED]>