Richard Baker wrote: > > For how this might be a wonderful > universe, see my > > http://cdr.sine.com/cdr/article.cfm?id=35 > Hmmm...
Okay, here's an interesting future universe that's still possible as far as we know: we invent nearly as fast as light travel, stable macroscopic wormholes (there's nothing in the known laws of physics to prevent either but they each present huge engineering challenges) Stable Macroscopic Wormholes violate _causality_. Take, for example, two (mother) ships with relative speed v. Each one of them launches one wormhole, using two auxiliary ships for each of them [so I have a total of 6 ships; maybe I am needlessly multiplying entities :-)]. If the two wormholes stop at the same space point [relative to one of the two motherships], the two wormholes will be out of synchronism. So we have a time machine. Alberto Monteiro
