The main battle is to make people realise that doubt is important. Doubt is good. The 'don't know' answer sometimes is the box you should tick, and it's about not being scared about that fact. Even the greatest minds don't know everything.

I have a problem with telling jokes about physics. Quite often the audience have no idea what you are talking about and, to be honest, I don't know what I'm talking about either.

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.

One idea I explore in my stand-up show is whether, if you try looking at the universe rationally and avoid coping mechanisms like mysticism or religion, you can still be happy knowing you are going to die after a brief time on this spinning ball.