[ExI] Drake Equation Musings
rafal.smigrodzki at gmail.com
Thu May 19 20:03:50 UTC 2016
On Thu, May 19, 2016 at 7:16 AM, Anders Sandberg <anders at aleph.se> wrote:
Remember the Bostrom and Tegmark paper on doomsday probability? It shows,
> using anthropics, that the probability of vacuum decay is less than one in
> a billion per year. If we had been living in a Shiva unniverse we should
> expect to be very early (since observers exist before the vacuum decay),
> but Earth formed after most other planets in the universe formed and we
> look like we are fairly late compared to when intelligence could have
### You are right, the Shiva explanation does not work without additional
assumptions about how early the first civs could have formed.
> Superluminal? I though all vacuum decay models had it spreading merely at
### This is one (of many) things I don't quite get: Inflation was
superluminal and occurred after the false vacuum decay that generated our
spacetime, so you would think the change would propagate superluminally.
Now that I think about it, maybe it went like this: vacuum decay generated
new dimensions and inflation occurred in these new dimensions, not in the
parent universe. Linde's eternal inflation does not blow up the
non-inflating domains, it keeps happening between them.
Well, anyway, even if the change is only at lightspeed, we won't see it
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the extropy-chat