2 Billion-year-old nuclear reactor

No, it’s not the aliens.

It’s a natural formation that contained a critical mass of uranium.

Now that is pretty damned cool.

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5 Responses to 2 Billion-year-old nuclear reactor

  1. LMB says:

    Besides, assuming aliens exist and actually visited here….why would they bother with a primitive fission reactor anyway?

  2. Old NFO says:

    That IS cool… yet another mystery 🙂

  3. Kristopher says:

    You hadn’t heard of the Oklo reactor?

    Old NFO: it ain’t a mystery. You put enough uranium together, and it will start reacting. Even in the form of ore. In the right medium, the natural reactor will be a breeder reactor.

    It’s been two billion years since there has been enough U-235 on the planet to do this naturally.

    U-235 has a half life of 700 million years, so during the past two billion a bit less than 7/8th of what was originally there at that time has either fissioned or decayed into other isotopes.

  4. DirtCrashr says:

    Well, it’s cold now but it was hot-hot-hot way beck then!

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