RADIOLYTIC BACTERIA INSPIRATION. “Bacterium Candidatus Desulforudis audaxviator, found 2.8 km deep in a South African mine, harvests energy from radiolysis, induced by particles emitted from radioactive U, Th and K present in surrounding rock. Another radiation source in the subsurface environments is secondary particles generated by galactic cosmic rays (GCRs).”
https://royalsocietypublishing.org/doi/10.1098/rsif.2016.0459