It turns out it's even worse than that. Plutonium and other "non-natural" elements have been found naturally occurring on Earth [1]. All sorts are supposed to h

It turns out it's even worse than that. Plutonium and other "non-natural" elements have been found naturally occurring on Earth [1]. All sorts are supposed to have existed historically at the Oklo natural nuclear reactor too [2]. Probably safer to call them transuranic elements. [1] https://en.wikipedia.org/wiki/Plutonium#Occurrence https://en.wikipedia.org/wiki/Plutonium#Occurrence [2] https://en.wikipedia.org/wiki/Americium#Occurrence https://en.wikipedia.org/wiki/Americium#Occurrence