Over the past 20 years, I have presented many science programmes on BBC1. But none is, I think, more socially important, or of more human interest, than this ongoing series of 'Child of Our Time.'

I think that good parenting should allow children to be children. That naivety and slightly open way of looking at the world is very valuable.

By discovering how our minds work, we can improve our learning power and unlock our true potential.

I don't like seeing myself on television and I don't enjoy filming. What I actually enjoy is thinking about how I am going to express something or how we are going to make the visual metaphor.

It is important that legislation keeps pace with scientific progress.

Surgeons always underestimate the pain and disability involved in what they do to people.

I do not know of any credible evidence that suggests Dr Zavos can clone a human being. This seems to be yet another one of his claims to get repeated publicity.

Although religion might be useful in developing a solid moral framework - and enforcing it - we can quite easily develop moral intuitions without relying on religion.

Parents should talk to their children, even when they are babies and can't talk back.

A young woman in her teens has about 300,000 eggs in her ovaries. By the time she is menopausal, none are left.

My first vote was for a communist in east London when I was a medical student. But I've voted Tory, Labour and Lib Dem in my time.

Without hard work and discipline it is difficult to be a top professional.

Middle age is youth without levity, and age without decay.

Toughness is in the soul and spirit, not in muscles.

History not used is nothing, for all intellectual life is action, like practical life, and if you don't use the stuff - well, it might as well be dead.

It is wonderful what miracles God works in wills that are utterly surrendered to Him.

In science we kill our hypothesis instead of each other.

Education should no longer be most imparting of knowledge, but must take a new path, seeking the release of human potentialities.

We're here for such a short time. When your great-great-grandkids study history, don't you want them to be proud that you were part of the solution?

The architect's role is to fight for a better world, where he can produce an architecture that serves everyone and not just a group of privileged people.

Oh, earth, you're too wonderful for anybody to realize you. Do any human beings ever realize life while they live it -- every, every minute?