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Comment by charlieflowers | Hacker News Reader

Perhaps this helps explain Fermi's paradox (at least partly) ... some of the many, many aliens we should have found by now might be living either out in the parent universe, or inside other black holes in our universe. I'm way out on a limb here, but it's an interesting speculation. Whadda you think?

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I don't think so because all the elements being plugged into the Drake Equation (for example) exist within our universe and not in any parental or child universes. In fact, the Drake Equation only speaks of potential life in our galaxy rather than the next step beyond that.

The estimates relating to the paradox all come from what we've understood to be around us - galaxies, stars, planets, etc.

(IANA anything of any consequence to this discussion - just an eager reader!)

Fermi's paradox would still hold for this universe, methinks.

Yeah, but there could be a new parenthetical, "likelihood of an alien living in another universe, multiplied by all the effects of Fermi's Paradox itself, and multiplied by the likelihood of that alien's ability to traverse universes."

I think that would be a very small extra factor, especially if you also add the likelihood of that alien's interest in traveling to specifically this part of this universe.

And of course, we have no reasonable basis for estimating any of those numbers. We have a sample size of one universe and we don't even know the rate of occurrence of life in that one. Still, it can be fun to speculate.

I don't think it helps much to explain Fermi's paradox since the estimation there is based on the size of the universe. If it turns out that the universe is massively bigger then so should the estimate of how many alien civilizations there are be.

He says "The arrow of time in our universe would therefore be inherited, through torsion, from the parent universe." I think that implies that any child universes, if they are parent->child and not a swirling cycle of interconnectivity via String Theory, would necessarily be younger.

So our children universes would inherently be younger than us, and that counts heavily against intelligent life, much less superior life the likes of which would have to come back through for us to meet. At least any time soon.

Consider other universes could be so different that they may not support life, at least not as we know it.

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