Natural nuclear fission reactor

[kf]

http://en.wikipedia.org/wiki/Natural_nuclear_reactor

[raphar]

I found this story some time ago before I knew Hacker News.

The sites where I found it at the time were:

an excerpt from The Ages of Gaia, James Lovelock (story like): http://www.alamut.com/proj/98/nuclearGarden/bookTexts/Lovelo...

and department of energy (fact like): http://www.ocrwm.doe.gov/factsheets/doeymp0010.shtml

[kf → raphar]

My source was http://kottke.org/09/11/natural-nuclear-reactors which also has some more links