I think all countries need to aim to cut the CO2 emissions per person, taking account of externalities like imports and exports.

In future, children won't perceive the stars as mere twinkling points of light: they'll learn that each is a 'Sun', orbited by planets fully as interesting as those in our Solar system.

Absence of evidence is not evidence of absence.

It will not be humans who watch the sun's demise, six billion years from now. Any creatures that then exist will be as different from us as we are from bacteria or amoebae.

I think a few hundred years from now we'll start having the 'posthuman' era of different species.

It's better to read first rate science fiction than second rate science-it's a lot more fun, and no more likely to be wrong.

We need to broaden our sympathies both in space and time - and perceive ourselves as part of a long heritage, and stewards for an immense future.

Science is a part of culture. Indeed, it is the only truly global culture because protons and proteins are the same all over the world, and it's the one culture we can all share.

I hope that by 2050 the entire solar system will have been explored and mapped by flotillas of tiny robotic craft.

I'm not myself religious but have no wish to insult or denigrate those who are.

Crucial to science education is hands-on involvement: showing, not just telling; real experiments and field trips and not just "virtual reality".

They who laugh the hardest are the same ones who have fought the toughest.The winner, though fraught with scarsstands alone, wholly victorious.

To me, patriotism is about working ethically and wholeheartedly in our chosen field.

If you want to be happy, you will be.

Back, back, back, back. Gone.

As long as my heart's still in it, I'll keep going. If the passion's there, why stop?

My dream is to one day own a country house on the shore in England, have gotten married, wipe some debt off and get a few more good films.

I often think the doctrine of fasting in Lent and having meatless days as old-fashioned...it might be better to give up television.

If they [animals] were really to get the equal consideration that I believe they should, we wouldn't have commercial animal production in this country.

I've never really done any interviews as myself.

The world could be anything, you know, It could be a solid state matrix of some sort. It could be an illusion. It could be a dream. I mean it really could be a dream.