Yet so vain is man, and so blinded by his vanity, that no writer,
up to the very end of the nineteenth century, expressed any idea that
intelligent life might have developed there far, or indeed at all,
beyond its earthly level.  Nor was it generally understood that since
Mars is older than our earth, with scarcely a quarter of the
superficial area and remoter from the sun, it necessarily follows that
it is not only more distant from time's beginning but nearer its end.