If all fossil fuel were to go POOF! tomorrow, the result would be a cataclysmic social upheaval, with food riots, warlords, shutdowns, breakdown of social order, water shortages, and outbreaks of bloodshed and disease.

I define science fiction as fiction in which things happen that are not possible today - that depend, for instance, on advanced space travel, time travel, the discovery of green monsters on other planets or galaxies, or that contain various technologies we have not yet developed.

Science and fiction both begin with similar questions: What if? Why? How does it all work? But they focus on different areas of life on earth.

The cemetery has ... an inscription: 'Though I walk through the Valley of the Shadow of Death I will Fear No Evil, For Thou Art With Me.' Yes, it does feel deceptively safer with two; but Thou is a slippery character. Every Thou I've known has had a way of going missing.

I have a big following among the biogeeks of this world. Nobody ever puts them in books.

There is something powerful in the whispering of obscenities, about those in power. There's something delightful about it, something naughty, secretive, forbidden, thrilling. It's like a spell, of sorts. It deflates them, reduces them to the common denominator where they can be dealt.

You think you have the amount of money that is your credit limit. We're just wired to think that, you know? Until the bill arrives - a sobering moment - you think you're richer than you are.