'The difficulty with this conversation,' said Arthur after a sort of pondering look had crawled slowly across his face like a mountaineer negotiating a tricky outcrop, 'is that it's very different from most of the ones I've had of late. Which, as I explained, have mostly been with trees.'

And the most interesting natural structure? A giant, two-thousand-mile-long fish in orbit around Jupiter, according to a reliable report in the Weekly World News. The photograph was very convincing, and I'm only surprised that more-reputable journals like New Scientist, or even just The Sun, haven't followed up with more details. We should be told.

It was none the less a perfectly ordinary horse, such as convergent evolution has produced in many of the places that life is to be found. They have always understood a great deal more than they let on. It is difficult to be sat on all day, every day, by some other creature, without forming an opinion about them.

Time affords us the ability to blame past errors on others while whole heartedly pronouncing our futures successes.

There was a terribly ghastly silence. There was a terribly ghastly noise. There was a terribly ghastly silence.

The last ever dolphin message was misinterpreted as a surprisingly sophisticated attempt to do a double-backwards-somersault through a hoop whilst whistling the 'Star Spangled Banner', but in fact the message was this: So long and thanks for all the fish.

For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much—the wheel, New York, wars and so on—whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man—for precisely the same reasons.