I usually capitalize the universe but in this whole blog post, I chose to be compatible with them
Neil Turok has been among the men who have spent years by hyping theories about "cyclic universes" and related laymen's ideas that have never explained anything in physics and that are really not capable of explaining anything, for very good reasons. So this enterprise became a religious activity of a sort – he needs to publish new papers just to create the illusion that the previous papers weren't a stupid waste of time.
The latest, 5-pages-long paper by Boyle, Finn, and Turok is called
CPT symmetric universe.The birth of a universe from nothing is bad, they effectively claim. Instead, the universe should be pair-created. It's the universe and the anti-universe that are created out of nothing which is nicer. The pair, universe plus anti-universe, are supposed to preserve the CPT. The anti-universe is interpreted as the "universe before the Big Bang", they propose.
Concerning the anti-universe, I can never fail to quote a favorite joke of mine which I learned from my diploma adviser in Prague. Aside from the universe, there also exists the anti-universe where everything is anti-. For example, the hardest science over there is anti-physics and it's researched by anti-Semites. ;-)
OK, let us return to the Turok et al. paper.