I think the key is this: >> Some microbes that don't breathe oxygen breathe hydrogen instead, but there's no evidence Henneguya does this. Some parasitic micro

I think the key is this: >> Some microbes that don't breathe oxygen breathe hydrogen instead, but there's no evidence Henneguya does this. Some parasitic microbes don't breathe themselves, but steal energy molecules called ATP from their hosts. "We believe this is what our parasite is doing," Huchon said. This isn't an entirely novel thing they've discovered. Similar animal-like things have been studied, but this is the first time it's actually animal cells being observed with the behavior. It's something we've seen before, but only in even lower forms of life. It's cool and new interesting, but it's not paradigm-breaking.