AH HAH! THE FIRST PROOF THAT THE "POOP THEORY OF DARK MATTER" IS INDEED CORRECT!
So I herein posit the "Poop Theory of Dark Power", as follows:
All the energy given off since the beginning of the Universe has been slowing and transitioning back to mass, and a spherical shell of pure mass has been for eons building and accumulating just beyond the edge of the limits of human technology's ability to detect it. At some point, this mass became great enough to exert attraction on the mass contained in the stars and planets; and as this outer shell of mass grows it exerts an ever-greater force that compels the rest of the universe to move outward at an ever-increasing rate of speed.
I'd look into this further except that on the pittance I make driving a hack I cannot afford to launch a space telescope nor operate a particle collider. And when you guys win that Nobel and split it with me, I'm going to use the money to go fishing. Hell's bells people, I just stated what's going on. What, you want me to try to stop it?
Anyway, just remember that I hold the copyright to everything I publish here. When you find out I am right, give me the credit and fork over the money. Somewhere in some stream there is a fish that waits for me to dine upon it. Personally, there isn't anything I can do to stop any of this, and frankly I can't be bothered to wring my hands over things that probably won;t happen for a million years or more.