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Published 1967 | Published
Journal Article Open

The Mantle of the Earth


In the first decade of this century physicists discovered that the atom had a massive central core which they called a nucleus, and geophysicists discovered that the earth had a massive central nucleus which they called a core. The study of the interior of the atom, the smallest building block of matter, and the study of the interior of the earth, the largest piece of matter to which man has direct access, have proceeded rapidly for the last 60 years. We now have exquisitely detailed information about the interior of both the atom and the earth.

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© 1967 California Institute of Technology.

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August 19, 2023
October 18, 2023