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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 said that if an alien came to visit, I'd be embarrassed to tell them that we fight wars to pull fossil fuels out of the ground to run our transportation. They'd be like, 'What?'

Most journalists expect me to answer all their questions about aliens and spaceships.

I like films that deal with some of those questions that you can never answer: 'Why are we here? What's it about? What happens to us with the choices that we make? What are the ramifications for doing something right, or doing something wrong?' Those universal questions, I enjoy.

For the most part, if somebody approaches me and says, 'I'd like to interview you,' who am I to say no, when I spend all my days going, 'Hello, you don't know me. I'd like to ask you some questions. Do you have a little time?'

If they want to talk about aliens and anything like that... that's part of the gift God gave us. That's what makes life exciting. We're pretty stuck, you know. What gives flight to our life is our imagination.

I'd like to ask you: what you would prefer us to do? I'd like to ask my colleagues, would any other country act differently? I think the answer is very clear. No one would act differently.

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.

'Why are we here?' 'What is our purpose? 'Is there an afterlife?' 'Is there a God?' 'Is it all about science?' Those are big questions, and usually, TV is a little scared to go there.