string can phone

The Okla Nuclear Reactor is some 2 Billion years old. Some contend that it’s a relic of an ancient civilization, but despite the good photos at the last link, I remain dubious. There is a good amount of information on this poorly-designed site, too. Have no fear, due to the half-life of U-235, naturally-occuring nuclear reactors can no-longer occur, naturally. ::sigh::