Time travel may be possible, but it is not practical.

A few years ago, the city council of Monza, Italy, barred pet owners from keeping goldfish in curved bowls... saying that it is cruel to keep a fish in a bowl with curved sides because, gazing out, the fish would have a distorted view of reality. But how do we know we have the true, undistorted picture of reality?

One should love animals. They are so tasty.

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.

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

Many people find the universe confusing - it's not.

Why are we here? Where do we come from? Traditionally, these are questions for philosophy, but philosophy is dead.