I think we need someone in a responsible political position to have the courage to say, 'Let's terminate human spaceflight.'.

Certainly one of the most enthralling things about human life is the recognition that we live in what, for practical purposes, is a universe without ….

My position is that it is high time for a calm debate on more fundamental questions. Does human spaceflight continue to serve a compelling cultural p….

I am never as clear about any matter as when I have finished writing about it..

I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far great….

In a dispassionate comparison of the relative values of human and robotic spaceflight, the only surviving motivation for continuing human spaceflight….

I was a kind of a one-man army. I could solder circuits together, I could turn out things on the lathe, I could work with rockets and balloons. I'm a….

These days, it's really been uninteresting except when disasters occur..

A man is a fabulous nuisance in space right now. He's not worth all the cost of putting him up there and keeping him comfortable and working..

Our family was very fond of the University of Iowa. We thought it was a good place to go..