New web site from cosmologist Max Tegmark and a host of other scientists:
http://www.fqxi.org/community/forum/topic/138
In recognition of FQXi of Doomsday week, suppose the world ended tomorrow. In particular, suppose that, as discussed in Kate Becker's fun article, we live in a 'false vacuum', that can decay to a lower energy state. The decay would take the form of a bubble of 'true' vacuum that grows at the speed of light, smashing into us with enormous energy without warning, annihilating everything we hold dear (even, perhaps, our beloved local laws of physics).
I wrote an article about a similar idea here:
http://www.starstreamresearch.com/vacuum_reaction.htm
The most interesting idea from the FQxi post:
Unless there is some aspect of awareness completely independent of your instantly-incinerated physical body, I can see no sensible meaning to 'you notice the bubble destroying you.' On the other hand, there are plenty of copies of you in the ensemble -- those with no bubble -- that go merrily along with their lives. Presumably the day after tomorrow 'you' are simply one of those, and 'I' am one of the corresponding surviving Anthonys. In short, how could we say with any confidence that we do *not* live in an unstable false vacuum?















