Mercury Sun Walkers

The sun is always just about to rise. Mercury rotates so slowly that you can walk fast enough over its rocky surface to stay ahead of the dawn; and so many people do. Many have made this a way of life. They walk roughly westward, staying always ahead of the stupendous day. Some of them hurry from location to location, pausing to look in cracks they earlier inoculated with bioleaching metallophytes, quickly scraping free any accumulated residues of gold or tungsten or uranium. But most of them...

 Technology Manufactures Social Change

The main thing, it seems to me, is to remember that technology manufactures not gadgets, but social change. Once the first tool was picked up and used, that was the end of cyclical anything. The tool made a new world, the next one changed that world, the one after that changed it again, and so on. Each time the change was permanent. Using the tool changes the user permanently, whether we like it or not. Once when I was in Moscow talking to academician Petrov, I said, “Why don’t you buy Am...

 The Thrill of Landing on a New Planet

To ANYONE who has been in space and experienced its changelessness, the real excitement of space flight comes when it is time to land on a new planet. The ground speeds backward under you as you catch glimpses of land and water, of geometrical areas and lines that might represent fields and roads. You become aware of the green of growing things, the gray of concrete, the brown of bare ground, the white of snow. Most of all, there is the excitement of populated conglomerates; cities which, on ...