I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach out to the stars.

We find ourselves in a bewildering world. We want to make sense of what we see around us and to ask: What is the nature of the universe? What is our place in it and where did it and we come from? Why is it the way it is?

If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.

Children in backseats cause accidents. Accidents in backseats cause children.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

One does not have to appeal to God to set the initial conditions for the creation of the universe, but if one does He would have to act through the laws of physics.