As far as we know,o as far and , i'm not saying that we areying t unique. >> i'm simply stating to theo th best of my knowledgekn, that there is no evidence for other. yeah, it's just life. i hope that there is and i hoper they're peaceful. obviously, the two important characteristics, but i'm just saying we haven't seen anything yet. so. but you think that we take our existence here for granted? yeah, i thin k there are threats to it. yeah. yeah, yeah. exactly. yeah,so i just think we shouldt assume that civilizationst. is robust. >>ou and if yo lu if you look al the history of civilizations,...