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peanuts

New guidelines state that foods containing peanuts are OK to introduce to babies as young as 4 to 6 months old — with certain caveats.

marijuana

HIGH HOPES  Cannabis plants such as this one yield marijuana and other substances that deserve expanded study for possible medical benefits, a large research review recommends. But negative physical and psychological effects of cannabis products can’t be ignored, the report says.

Mouse hunting

MASTER HUNTER  Nerve cells in a mouse’s amygdala send messages that help the rodent chase and kill prey such as crickets, a new study shows.

Body & Brain

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