Now I'm a scientific expert; that means I know nothing about absolutely everything.

Now, before you make a movie, you have to have a script, and before you have a script, you have to have a story; though some avant-garde directors have tried to dispense with the latter item, you'll find their work only at art theaters.

We always thought the living Earth was a thing of beauty. It isn’t. Life has had to learn to defend itself against the planet’s random geological savagery.

As three laws were good enough for Newton, I have modestly decided to stop there.

Those wanderers must have looked on Earth, circling safely in the narrow zone between fire and ice, and must have guessed that it was the favourite of the Sun's children.

No trilogy should have more than four books.

But please remember: this is only a work of fiction. The truth, as always, will be far stranger.