The universe is governed by science. But science tells us that we can't solve the equations, directly in the abstract.

I believe in the possible. I believe, small though we are, insignificant though we may be, we can reach a full understanding of the universe. You were right when you said you felt small, looking up at all that up there. We are very, very small, but we are profoundly capable of very, very big things.

It matters that you don't just give up.

In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?

Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'

As we shall see, the concept of time has no meaning before the beginning of the universe. This was first pointed out by St. Augustine. When asked: What did God do before he created the universe? Augustine didn't reply: He was preparing Hell for people who asked such questions. Instead, he said that time was a property of the universe that God created, and that time did not exist before the beginning of the universe.

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.