QCCQ: A Short History of Nearly Everything

Quote: “This is one reason that some experts believe there may have been other big bangs, perhaps trillions and trillions of them, spread through the mighty span of eternity, and that the reason we exist in this particular one is that this is one we could exist in” (pg 15)

Comment: This quote speaks to a very interesting theory that the reason for our existence on this planet is due to the correlation or coincidence of environmental conditions. To me it implies the idea that our existence was bound to happen due to the number of "Big Bangs" this statement claims to have occurred. Who knows maybe we are part of a divine cycle that every once in while creates a universe that could accommodate evolution.  The most interesting idea that comes to mind is that we, being all the living organisms ever to survive in this universe, may not be the only species in the history of universes to ever exist; according to this quote it is quite possible that trillions upon trillions upon trillions of years ago life forms similar to ours could have existed.

Connection: This theory made me think of our universe and our unlikely creation as a probability equation. Even though I do not quite know the exact details to said equations, I do know the probability of our existence is very slim. Even more so, the probability of my existence in this universe is slimmer than slim. From simple concepts like probability, which can be used to predict the likelihood of occurrences, to more complicated concepts like fractals and fractal dimension, which can be used to describe the irregularity of nature, math is relatable to everything.

Question: What is the physics behind the creation of our universe? What is the optimal conditions, on an molecular level, for our species to survive?