Science: Atomic Earth Study

Man-made atomic explosions can help scientists explore the center of the earth, 4,000 miles down. This is the hope of Professor K. E. (for Keith Edward) Bullen of Australia's University of Sydney, who told a Toronto meeting of geophysicists last week that he has already used waves from A-and H-bomb explosions to refine his theories about the earth's deep metallic core.

Most information about the earth's interior, Mathematician Bullen pointed out, has been gained by recording and measuring the several kinds of waves sent out by earthquakes. As the waves travel through the earth, they are bent and reflected in complicated ways....

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