A while ago now, the Oklo nuclear reactor ran - according to wikipedia [0] - for a few hundred thousand years albeit only with power levels averaging less than

A while ago now, the Oklo nuclear reactor ran - according to wikipedia [0] - for a few hundred thousand years albeit only with power levels averaging less than 100 kilowatts. It was discovered because there was a discrepancy in the amount of uranium expected from a mine and the amount they actually got. [0] https://en.wikipedia.org/wiki/Natural_nuclear_fission_reactor https://en.wikipedia.org/wiki/Natural_nuclear_fission_reacto...