If this is all by Max Tegmark, as the byline says, it is taking a very different view from his recent book "Our Mathematical Universe" where he espouses the idea of infinite multiverses.-If he is now in favour of throwing infinities out of physics I'm whole-heartedly in support. I've been saying this for years.-I suspect the 1089 photons you refer to should be 10^89.-By the way Pythagoras and the other Greek mathematicians didn't espouse infinity. They were very cautious about such claims.