it's there at the bottom: 10^10^10^56 "Around this vast timeframe, quantum tunnelling in any isolated patch of the vacuum could generate, via inflation, new Bi

it's there at the bottom: 10^10^10^56 "Around this vast timeframe, quantum tunnelling in any isolated patch of the vacuum could generate, via inflation, new Big Bangs giving birth to new universes [...] this is also the time required for a quantum-tunnelled and quantum fluctuation-generated Big Bang to produce a new universe identical to our own, assuming that every new universe contained at least the same number of subatomic particles and obeyed laws of physics within the range predicted by string theory."