The universe collapsing around our ears, and he would find it funny that I had a large clamp across my mouth.

Amelia soon disappears: a sign, according to the Doctor, that the universe is collapsing rapidly.

If the acceleration is decreasing then at some point the universe theoretically could collapse back in on itself.

This original universe collapsed due to the manipulations and reproduction of the Celestial race.

For example, if the universe formed and then collapsed quickly, there would not be enough time for life to form.

Our universe will collapse into a singularity, a black hole much like the state in which it began.

Alternatively the universe may collapse in a big crunch, although current data shows the rate of expansion is still increasing.

It is implied that this is also the point to which the universe will eventually collapse.

But this couldnt happen, because the universe would collapse every time a photon was generated.

They believe that without this balance, the universe will collapse into chaos.