One interesting thought I had, and I've yet to find any information on it, is the merger of space expansion and quantum physics. Quarks, the particles that compose protons and neutrons, interact through the strong nuclear force. What's interesting about this force is that its strength decreases as a factor of range, rather than range squared like gravity or electromagnetism. This means that, if you were to pull apart two quarks, you'd eventually add enough energy to the strong force that there'd be enough energy in the bond to create a quark-antiquark pair rather than increasing the range in which the force acts across. This would be equivalent to stretching a rubber band until the elastic potential reached a point where two rubber bands existed instead of one stretched one. Now, we also observe the expansion of the universe. Not only is space being created throughout the universe, but it's being created at a faster rate. There is an idea called the "big rip" where space expansion accelerates to the point of ripping atoms apart. This idea I have asks the question: can space expansion accelerate to the point where enough energy is created between two quarks within a short enough time frame (across a Planck time, maybe) that a new universe is created? In analogy, could you "stretch the rubber band" so quickly that the existing universe didn't have time to dissipate the massive amounts of energy fast enough?