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Read articles, including Science News stories written for ages 9-14, on the SNK website.
WHAT A RELIEF!

These sequences of ancient sedimentary rock layers in the Mars region known as Arabia Terra show periodic, stair-step patterns. A new study suggests the formations have this structure because of periodic climate changes in the planet's past. Credit: Credit Topography: Caltech; HiRISE Images: U of Arizona, JPL/NASA

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