Comment by gus_massa

I agree. It's just a tiny parasite archea. It's common for parasites to get smaller and lose features over time. So it's clearly alive, and the title is linkbait (or totaly wrong).

I made a similar comment in an old thread about this but I can't find it. My biology is not good enough to give details about the phylum (or whatever, I never remember the classification), but I have the same annoyment in many posts about math or physics.