Through a SPAC after their application to license their design was denied by the NRC, and the responses seem very immature. Does not inspire confidence.
Oklo is a region near the town of Franceville, in the Haut-Ogooué province of the Central African country of Gabon. Several natural nuclear fission reactors were discovered in the uranium mines in the region in 1972.
I assumed the natural reactors might still be fissioning, but the Wikipedia page says this occurred about 1.7B years ago. They know they were reactors because the cite has a lower concentration of uranium-235 than expected and also reaction by-products.
https://www.reuters.com/article/oklo-m-a-altc-acquisition/nu...