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Cover Figure


COVER Crystal structure of Earth's deep mantle. Coordination polyhedra of oxygen atoms (white) around silicon atoms are shown as octahedra; magnesium ions are in yellow. Experiments simulating the high pressure and temperature of the deep Earth yield a new view of the lowest 200 to 300 kilometers of mantle, as described on page 855. [Image: M. Murakami]

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Science. ISSN 0036-8075 (print), 1095-9203 (online)