Originally posted by FabianFnas
Cold fusion may indeed be possible. Perhaps with the aid of a catalyst of some kind. Future will tell.
But I don't believe that any bacteria use cold fusion to create energy for their internal energy metabolism. I think the result would be destructive of its genetic material.
Bacteria have robust DNA repair mechanisms, they can take a lot of radiation. I think the radiation in this case would be neutrons.
There was a 'mythbusters' show the other day that tested the radiation resistance of various bugs, the myth was that cockroaches are the kings of radiation resistance. They lived with 10,000 rad doses, ten times the lethal dose of humans. However there was one bug that took 10 times that dose to die, some kind of fly, forget which, but it was shown the cockroach myth to be wrong, ten times more likely to die than that fly species they showed.
The thing about the possibility of bacterial fusion is the reaction would be so powerful it would provide hundreds of times the energy of any chemical reaction so it would not take very much fusion to power such a life form.