It really was a Big Bang
How the Big Bang really happened. Dark Energy is just the gravitational pull of a very large cosmos. It's such a simple solution for Dark Energy and it also simplifies so much more. No need for the improbable 'expansion’ of the universe, cosmological redshift or even that greatest of mathematical improbability Inflation theory. In the accepted story the universe appears from nothing and disappears into nothing. It really is much simpler and rational than that.
In the Beginning.......... The Big Bang story is the best creationist story of all time. From nothing came a tiny amount of matter through a trillion to one chance imbalance between matter and antimatter. Then, and this is the best bit, for no obvious reason this doubled in size and weight about a 100 times and then stopped as suddenly as it began. Or, it carried on doubling creating enough multiverses to satisfy every possible theory of the universe. Inflation Theory is fine from after the initial Bang. It just starts from the wrong place. Imagine a cosmos full of matter sufficient to generate the force of Dark Energy. Remember that in our universe Dark Energy is 15 x more than all the baryonic matter. So our observable universe is just a tiny part of the greater cosmos. So there is a lot of matter out there. Before we look at the start let's look at the fate of our universe. Eventually all the stars will end up in supermassive black holes. Even the stuff that leaves our observable universe will end up following the Dark Energy / cosmic gravity to a cosmic black hole. Everything is going to end up in a black hole. So black holes are actually the standard stuff of the cosmos. The cosmos is just an awful lot of very big black holes. So how did it all start? Certainly not from nothing! Not from a quantum improbability! We have to remember that the Big Bang theory started backwards. When to everyone’s surprise it was discovered that the universe was expanding the mathematicians took over. Now I have nothing against mathematicians. I went to university to study maths. I loved it. I just got disillusioned when we got to Imaginary numbers. Mathematicians are like accountants in business; you need them, just don't let them take the big decisions. So the maths people did what they love doing, they extrapolated back to a Singularity. You should never trust a zero or an infinity, ever. Forget the Singularity and Inflation theory stuff. It's all much simpler in the real cosmos. We have a cosmos full of massive black holes. Could it be a binary fusion which triggers it. The resulting massive black hole becomes unstable and - BANG,yes, bang! Now we have all been told that the Big Bang was not an explosion. A cosmic explosion is a lot more likely than the standard creationist / inflation version. We have seen gravity create neutron stars and black holes from normal matter. We have no idea about the structure inside a black hole. We cannot conceive of the pressure inside a super massive black hole or even a cosmic scale black hole. Whatever the process, our Big Bang did not create our universe from nothing. Once we assume or even prove that the cosmos is full of matter then the starting point for our universe and so much more becomes simple.