My life is constant revision but it's not revision, a lot of it is for the first time.

My wife could turn to me and she may say, 'Why do you love me?' And I can with all honesty look her in the eye and say, 'Because our pheromones matched our olfactory receptors.'

Homeopaths do not have a physical brain, but merely 'skull water' with the memory of brains.

If the Royal Variety Show was put in a matter transportation machine with the Royal Institution Christmas lectures, this is what you'd get.

I thought I better warn you that I am not one of those politically correct comedians, but it turns out that also I'm not really that racist, homophobic or woman hating either, so you might not notice

They gave 12 monkeys a typewriter for a week, and after a week, they only used it as a bathroom.

There can be a science to joke writing, there are certainly rules and patterns that can be followed, but I think most of the best comedy goes beyond the rules.

We very quickly forget about the wonderful things we've got. People lose their excitement because there's too much. Basically we're experiencing nothing, because everything is available to us.

I'm glad the universe is pointless. It means if I get to the end of my life, the universe can't turn to me and go, 'What have you been doing, you idiot? That's not the point!

Wherever you are on Earth, there is more life present than in the rest of the known universe.

Science is very cross-generational; you're not just aiming it at twentysomethings, or eightysomethings. Every town's got a really broad selection of people and age groups interested in science.

The heart wants what the heart wants

My dad always told me that I could be anything I wanted, if I was willing to work hard enough to achieve it.

God deliver me from my friends! I'll take care of my enemies myself.

Truth is a flower in whose neighbourhood others must wither.

Definitely gymnastics, because I was a gymnast for 11 years. That's my thing. My girlfriend Betty Okino was in the 1992 Olympics and won a bronze medal. She's a gymnast. So I'm a huge fan.

Having adventures comes natural to some people", said Anne serenely. "You just have a gift for them or you haven't.

We no longer have a choice between violence and non-violence. The choice of today stands between nonviolence or non-existence.

Being religious without knowing the cross is like owning a Mercedes with no motor. Pretty package, but where is your power?

If a country is producing guns, it becomes an immoral entity and no immorals ever have the right to talk about any kind of morality!

How well you do in life shouldn't depend on how well your parents did.