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

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.

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".

An insect is more complex than a star..and is a far greater challenge to understand.

The laws of gravity work everywhere except in the heart and the soul.

The price tag that you put on your soul will determine the people and circumstances in which you find yourself.

A month in and it seemed to CY that he was an explorer summiting the foothill of an a bizarre and primitive island.

Something must be left to chance nothing is sure in a sea fight.

Stone Mountain, Georgia, still had Ku Klux Klan marches, and I had a wild and courageous mother who'd put us in the car to watch them. She wanted us to know those things existed.

All is not done when we have spoken to God by prayer; our petitions are to be pursued with real endeavours.

I am very glad I have travelled. Travel improves the mind wonderfully, and does away with all one's prejudices.

Develop your visual memory. Draw everything you have drawn from the model from memory as well.

People have said there is an integrity about me, and I think there is. I don't try to follow a trend. I have my own little path.

Patience is the healthiest ingredient of our life.