NASA Discovers bacteria which uses Arsenic

[Anomalocaris]

I saw a interesting speculation that very short lived but very fast paced iron based life may be plausible on the surface of a neutron star. Basically neutron star is thought to be made from neutron degenerate matter with a thin crust of very hot normal atoms, a large percentage of which would be iron, compressed under intense gravity to a very high density. It was calculated that in this situation very dense packs of very energetic atoms can form very complicated but short lived molecule like structures, and some of the structures can self replicate, potentially leading to something like life. The temperature and pressure would mean all reactions would very fast, thus lifespan would be short and any evolution intensely fast.