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Science 16 May 2008:
Vol. 320. no. 5878, p. 867
DOI: 10.1126/science.320.5878.867

News Focus

PLANETARY SCIENCE:
Layers Within Layers Hint at a Wobbly Martian Climate

Richard A. Kerr

Scientists scrutinizing layered rocks on Mars report online this week in Science that the layers formed in sync with changes in the planet's orbit.

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