Earth's sisters; the visions provided by planetary science inspire and fascinate; they also shed new light on the workings of the earth. (The Planets)

From: The Economist (US) | Date: December 23, 1989 | Copyright information

The visions provided by Planetary science inspire and fascinate. They also shed new light on the workings of the earth

THE unique is always a problem for science. Scientists are trained to measure, and to measure is always to compare. Science makes sense of diversity; it finds hidden similarities and explains seemingly chance differences. Sometimes, though, the unique is all there is. Earth scientists have only one earth.

However, though it may take pride of p...

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