I have a theory of why the universe is expanding (leaving big bang out).

Gen. relativity says that more the mass of an object, more is the curling up of spacetime.

Say, suppose that there is some critical value for which spacetime curls completely into a closed surface (say, a sphere). now, assume the total mass of our universe is greater than this limit and spacetime has curled more than once around itself into a smaller sphere.

Now, we see, that in our universe, matter is continuously being converted into energy but the reverse happens very rarely (non-spontaneously).

So, the mass to energy ratio is decreasing in our universe.

Come to the first argument that space has curled more than once around itself. Now, since the mass of the universe is decreasing, the coils of spacetime are loosening, and so the sphere (universe) is increasing in size.

Hence concludes my theory

COROLLARY(1): when the sphere of spacetime has finished uncurling into a single sphere whose surface area is the same as that of the fabric of spacetime, either conversion of mass into energy will stop, or the universe will merge into a sea of parallel universes or get destroyed.

COROLLARY(2): If all this happens, then spacetime is a finite fabric, so, time ends somewhere.

Please comment.