We don’t know a great deal about the social life of archaea, especially how they interact with their more abundant cousins: bacteria. What we do know is mostly about syntrophic interactions, where archaea and bacteria live together for mutual benefit. 2/10

But what about antagonistic interactions, which are very common between different bacteria? Are archaea just... nice? Probably not: archaea, it turns out, quite like to smash each other up (at least the halophiles). 3/10