From www.discover.com:
"It took humans until the 20th century to build a nuclear
reactor. Mother Nature, on the other hand, built one that turned
itself off and on, stored its waste, never threatened a
meltdown —- and did it 2 billion years ago."
http://www.discover.com/web-exclusives/natures-nuclear-reactor0204/
http://makeashorterlink.com/?B5E92162C
http://tinyurl.com/bblvf
http://url123.com/8dnkc
Dave
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