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1:04pm, June 29, 2012

ENVIRONMENT
Snow layers warm northern soils, reducing how much climate-warming carbon the ground can hold. See “Arctic’s wintry blanket can be warming.”

ON THE SCENE BLOG
A Science News editor visits Iceland’s Eyjafjallajökull in “Icelandic volcanoes slumber today, but not forever.”

GENES & CELLS
Sirtuin proteins, associated with longer life spans, also help sync the body’s circadian clock. See more in “Antiaging protein helps set daily rhythms.”

BODY & BRAIN
Untreated fevers during gestation may double the risk of having a child with autism. See &ldquo

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