Belief in God is apparently a psychological artifact of mammalian reproduction.

It has yet to be proven that intelligence has any survival value.

Isaac Asimov is, in reality, based on something I had invented a few years previously.

The inspirational value of the space program is probably of far greater importance to education than any input of dollars... A whole generation is growing up which has been attracted to the hard disciplines of science and engineering by the romance of space.

The choice, as Wells once said, is the Universe-or nothing. . . . The challenge of the great spaces between the worlds is a stupendous one; but if we fail to meet it, the story of our race will be drawing to its close. Humanity will have turned its back upon the still untrodden heights and will be descending again the long slope that stretches, across a thousand million years of time, down to the shores of the primeval sea.

No communication technology has ever disappeared, but instead becomes increasingly less important as the technological horizon widens.

Why, Robert Singh often wondered, did we give our hearts to friends whose life spans are so much shorter than our own?