"The very opening of Hitchhiker's Guide tells us how unimportant we all are. It starts with a mix of scientific terms: the western spiral arm of the galaxy is unfashionable, the sun has an unimportant planet at a distance of 92 million miles, and so on. If you know your astronomy, you know that's us. How often do we get a look at our planet from such a cold, distant, scientific viewpoint?"