To speak of the existence of anything meaningfully, it must be in some sense available for experience. So a jus maknesan, if theare a big tane mus ive, i toaxisten. Yo, by or for whatever reason, there will absolutely no life on any planets, including all and tik happens. An thats i o morayta. That particular hypothetical universe dis not exist. Don't notice, did such a universe exist? No. How do you know such an universe existed? I say, because there are these scientific theories and equations which predict the existence of a supa string Oke possibly if that theory is correct, then it does