The last natural nuclear fission reactor

A group of scientists argue the case for not mining the last known nuclear fission reactor located in Oklo, Gabon. Studies of its nuclear fission reactions, which occurred 2 billion years ago, are essential to our understanding of how fission products and actinides could migrate in nuclear waste repositories. Such a resource is almost irreplacable and its commercially viable uranium contents low, adding strength to the argument for conservation. (UK)