Is anyone aware of any evidence to suggest a cyclical universe: expanding then shrinking back to a singularity and expanding out again?
It seems, based on what I've learned, that the currently expanding universe will either end in a heat death, having burned out, or possibly a big rip, where the dark energy driving the expansion at ever greater rates finally kicks in on an atomic scale and rips all matter apart.
The cyclical view seems to be one of wishful thinking, like Aristotle's perfect spheres > Copernicus' circular orbits, or Einstein's Steady State universe. If dark energy (whatever that turns out to be) is the force driving the expansion, and is already greater than gravity now, while the mass of matter is more closely arranged, it can hardly be expected to then suddenly rein in and reverse expansion (in some sort of rubber band effect).
The idea of a cycle of birth death and rebirth seems to be an attractive one. Such ideas seem to have kind of a poor track record vs reality.