Then we shall... 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 have experimental evidence that time travel is not possible.

In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.

One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away.

There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.

We don't let animals suffer, so why humans?

We think we have solved the mystery of creation. Maybe we should patent the universe and charge everyone royalties for their existence.