Or in other words, why does disorder increase in the same direction of time as that in which the universe expands? - Stephen Hawking

I think that it's important for scientists to explain their work, particularly in cosmology. This now answers many questions once asked of religion.

However, if we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason — for then we would know the mind of God.

I discount suggestions that UFOs contain beings from outer space, as I think that any visits by aliens would be much more obvious - and probably also much more unpleasant.