I read this and thought the Maatians would get a "Big Bang" out of this...
pun intended
I'm familiar with the "Big Bounce" but had never heard of the "Mirror Universe".
Article by Patchen Barss from BBC Future.
Quote
Patchen Barss
Neil Turok has also been exploring another avenue for a simpler alternative to inflationary theory, the “Mirror Universe”. It predicts that another universe dominated by antimatter, but governed by the same physical laws as our own, is expanding outwards on the other side of the Big Bang – a kind of “anti-universe”, if you like.