Science: Colonies in Space

By the year 2050, the earth may be dangerously overpopulated and polluted. Even so, says a Princeton University scientist, there might be a way out for some of the world's teeming billions. By that time, according to Physicist Gerard K. O'Neill, streams of earthlings could well be en route to comfortable new homes in space.

The idea should not be lightly dismissed as a science-fiction daydream. O'Neill has impressive credentials, among them his conception of the colliding-beam storage ring principle, which has been used in the design of some of the world's most powerful particle accelerators. His scheme for space colonies was...

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