Very interesting thread. Doctors are now telling us to get 15-20 minutes of direct sun per day to help with Vitamin D levels to prevent certain cancers. And of course every individual has different tolerances to radiation. Last year the local paper ran a story about a judge well in his 70's. Before law school this guy was famous for having been in the most above ground atom bomb tests in the 50's and early '60s! His reason for volunteering was "It was the closest army base to Las Vegas!". This guy has no ill health effects. The docs ought to study him top to bottom.