Natural radioactive decay is also an example of fission - just not a fission chain reaction (… except when it is! https://en.m.wikipedia.org/wiki/Oklo https://e

Natural radioactive decay is also an example of fission - just not a fission chain reaction (… except when it is! https://en.m.wikipedia.org/wiki/Oklo https://en.m.wikipedia.org/wiki/Oklo )