[MawKKe]

I mean, it's possible that at some point evolution produced such nuclear reactored individual, but who got "naturally selected" rather quickly for obvious reasons

[jaggederest]

If you read some of the Dune supplementary materials, the sandworms are biological nuclear reactors. It's kinda handwavey but it's a cool concept - how do you keep a creature the size of a freight train moving constantly in a very thick medium... how about harvesting fissionables?

[tzs]

See the Isaac Asimov story "Pâté de Foie Gras" from the September 1956 issue of Astounding Science Fiction, available here [1] on the Internet Archive.

[1] https://archive.org/details/sim_astounding-science-fiction_1...