Nitrogen is utterly harmless and nearly inert in its gaseous state. It’s usually content to be N2, which barely wants to react with anything. Human bodies ignore the stuff despite every breath being 78 percent nitrogen. As for Erid, their atmosphere is mostly ammonia—a nitrogen compound. How could a panspermia event ever seed Earth and Erid—two nitrogen-riddled planets—if a tiny amount of nitrogen kills that life? Well, the answer to that is easy: Whatever the life-form was that caused the panspermia, it didn’t have a problem with nitrogen. Taumoeba, which evolved later, does.
Sybau
