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BODY & BRAIN
‘Normal’ B12 levels may not be enough for the brain. Read “B12 shortage linked to cognitive problems.”

LIFE
A penguin can find its kin even in a sea of black and white. See “Penguins may sniff out relatives.”

ATOM & COSMOS
A NASA probe has found bizarre landforms on the planet nearest the sun. Read more in “Messenger from Mercury.”

HUMANS

A teenager’s alcohol use is influenced by the friends of the teen’s boyfriend or girlfriend. See “Teen daters pal up to the bottle.”

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