Science: Push into Space

(See Cover) When the Soviet Lunik raced past the moon and free of the earth last week, it did more than win a triumph for its designers. It also marked a turning point in the multibillion-year history of the solar system. One of the sun's planets had at last evolved a living creature that could break the chains of its home gravitational field.

After a few more moments on the evolutionary time scale, earth's restless social primate, man, can almost surely make himself felt throughout the system. Earth's life will no longer be confined to...

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