I urge you to read Eternal Treblinka and think deeply about its important message.

The most important thing is to actually think about what you do. To become aware and actually think about the effect of what you do on the environment and on society. That's key, and that underlies everything else.

I am not deeply involved in Australian politics but I know there are prime ministers, governments around the world who are not acting responsibly in relation to climate change.

What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.

I think we're still in a muddle with our language, because once you get words and a spoken language it gets harder to communicate.

When I was 10 years old, I loved - I loved books, and I used to haunt the secondhand bookshop. And I found a little book I could just afford, and I bought it, and I took it home. And I climbed up my favorite tree, and I read that book from cover to cover. And that was Tarzan of the Apes. I immediately fell in love with Tarzan.