I'm very interested in film making. It's telling a story, fiction or non-fiction. I have been filmed quite a lot. Contrary to popular belief, filming isn't glamorous. It can be wearingly repetitious, as the same shot is taken over and over again.

I thought Eddie Redmayne portrayed me very well... At times I thought he was me.

Speech has allowed the communication of ideas, enabling human beings to work together to build the impossible. Mankind's greatest achievements have come about by talking, and its greatest failures by not talking. It doesn't have to be like this. Our greatest hopes could become reality in the future. With the technology at our disposal, the possibilities are unbounded. All we need to do is make sure we keep talking.

A million million million million (1 with twenty-four zeros after it) miles, the size of the observable universe.

The meaning in life is not out there but inbetween our ears. In many ways this makes us the lords of creation.

The increase of disorder or entropy with time is one example of what is called an arrow of time, something that distinguishes the past from the future, giving a direction to time.

When I hear of Schrödinger's cat, I reach for my pistol.