[Mohsen]

So, what happened to world expansion. Let's go back to the main topic.

Let's outline the facts based on most popular theories,

The burst of energy at the time of Big Bang created the initial rapid inflation of space.

The residual expansion had continued for another 7 billion years.

Mattr creation increased the gravity which have slowed down the expansion.

It is proposed that the space expansion of the next seven billion years is due to dark energy.

The nature of dark energy is not known.

The expansion of the universe is accelerating is accelerating.

If the matter density in the universe is constant (critical density), Then matter creation has to continue along the space expansion.

The above are few points which should be able to to bring the discusssion in the track.

Cheers