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Oklo Fossil Reactors
Where are these Natural Fossil Reactors?
When did these Natural Fossil Reactors start operating?
What caused these Reactors to start?
Why are these Natural Fossil Reactors important?
Who Discovered these Natural Fossil Reactors?
About the Author


The Oklo Fossil Fission Reactors

This is one of the most fascinating stories in the relatively short history of Science and especially in the even shorter history of Nuclear Physics.

In 1972 the very well preserved remains of several ancient natural nuclear reactors were discovered in the middle of the Oklo Uranium ore deposit.

Since their discovery the Oklo reactors have been studied by many scientists around the world who have uncovered the answers to the following questions.

  • Where are the Oklo reactors located?
  • When did the nuclear reactions occur?
  • What caused the nuclear reactions to start?
  • Why are these reactors worth studying?
  • Who discovered the reactors
  • How were the reactors discovered?
At this site you can explore the answers to these and many other questions about the Oklo natural fossil reactors and investigate many other things about nuclear fission.

Other Oklo/Nuclear Links

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For more information you can email the author (Dr Robert Loss) at