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That would be such a life-changing thing, for us all to know that there are other beings out there who we could potentially communicate with, or maybe we are listening to a signal that they transmitted hundreds of millennia ago.

If we ever start communicating with living creatures from other planets, the number one priority is, how are you going to communicate information? Even between different cultures here on Earth, you get into communication problems.

If we ever established contact with intelligent life on another world, there would be barriers to communication. First, they would be many light years away, so signals would take many years to reach them: there would be no scope for quick repartee. There might be an IQ gap.

In all of my work, I think I'm exploring the idea that we are aliens to each other, how there is a huge distance that separates us all.

If an alien visited Earth, they would take some note of humans, but probably spend most of their time trying to understand the dominant form of life on our planet - microorganisms like bacteria and viruses.

I think anybody would have to be with out common sense to think there weren't aliens. There are billions of planets, and I am convinced Earth is not the only one that's inhabited. It would be quite an ego trip to think that. I think about it all the time.

Aliens didn't come down to Earth and give us technology. We invented it ourselves. Therefore it can never be alienating; it can only be an expression of our humanity.

I don't believe that there are aliens. I believe there are really different people.

Perhaps we've never been visited by aliens because they have looked upon Earth and decided there's no sign of intelligent life.

The one way to discover about aliens is to tune your radio telescope and listen to the signals.