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chili peppers

HOT STUFF  Capsaicin, the stuff that gives chili peppers their heat, relieves pain by a previously unknown process.

pill man

TOUGH TO SWALLOW  Antioxidant pills may not help athletes after all.

Male bluebird feeds female

BREEDING AGGRESSION   Among western bluebirds, harassed mothers tend to give extra hormones to their eggs, a gift that ends up leading to waves of hostile takeovers.

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