Look there's no metaphysics on earth like chocolates.

It has become part of the accepted wisdom to say that the twentieth century was the century of physics and the twenty-first century will be the century of biology.

At the moment I'm doing this space movie so I'm obsessed with physics and space travel. I know three months down the line it's gone. Then I'll be able to superficially say stuff about space.

I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.

In 1948 I entered the Massachusetts Institute of Technology undecided between studies of chemistry and physics but my first year convinced me that physics was more interesting to me.

My intention was to enroll at McGill University but an unexpected series of events led me to study physics at the Massachusetts Institute of Technology.

The laws of physics should allow us to arrange things molecule by molecule and even atom by atom and at some point it was inevitable that we would develop a technology that would let us do this.

I'm the son of an everyman. My father is a teacher. He teaches physics at a boys' school in Sydney.

My physics teacher Thomas Miner was particularly gifted. To this day I remember how he introduced the subject of physics. He told us we were going to learn how to deal with very simple questions such as how a body falls due to the acceleration of gravity.

How many of you have broken no laws this month? That's the kind of society I want to build. I want a guarantee - with physics and mathematics not with laws - that we can give ourselves real privacy of personal communications.