One theory which can no longer be taken very seriously is that UFOs are interstellar spaceships.

Good morning, Dr. Chandra. This is Hal. I am ready for my first lesson.

If man survives for as long as the least successful of the dinosaurs-those creatures whom we often deride as nature's failures-then we may be certain of this: for all but a vanishingly brief instant near the dawn of history, the word 'ship' will mean- 'spaceship.'

Even by the twenty-second century, no way had yet been discovered of keeping elderly and conservative scientists from occupying crucial administrative positions. Indeed, it was doubted if the problem ever would be solved.

Judge me by my deeds, though they are few, rather than my words, though they are many.

Utopia was here at last: its novelty had not yet been assailed by the supreme enemy of a ll Utopias - boredom.

The Shuttle is to space flight what Lindbergh was to commercial aviation.