I'm a structural engineer but I have a degree in Geology as well. I'm very interested in cosmology and I'm starting a new cosmology blog at www.the-cosmic-corner.com At this web site I have introduced a cosmology that I developed. Some believe that a previous universe may have contracted to a point and then bounced to create a big bang and our universe. But I think that bounce cosmology is just a special case of all possible bang events that could occur when we consider quantum gravity in a multiverse environment. I think that if we want to consider all possible bang events in a multiverse where quantum gravity functions, we must also consider bang events from black holes that are equivalent to a contracted universe. So when we move bounce cosmology into a multiverse, another path to a bang becomes possible because the bounce occurs at some maximum density and that same density could eventually occur in a black hole if it obtains enough mass.