The Oklo fission reactors are the only known examples of a natural nuclear reactor here on Earth … For approximately 30 minutes, the reactor would go critical, with fission proceeding until the water boils away. Over the next ~150 minutes, there would be a cooldown period, after which water would flood the mineral ore again and fission would restart.
Source: Mother Nature Created A Natural Nuclear Reactor on Earth 1.7 Billion Years Ago – Neatorama
Kermit is an omnicompetent individual who grew up in a former bawdy house before relocating to his state’s capital city. His family includes many talented artists and an uncle who founded The Church of Bigfoot. He has a passion for storytelling often exploring new ways to engage audiences.

