Rio's urban gardens produce healthy food for the poor

Gun-toting youths watch over a street in a Rio de Janeiro slum hit hard by drug trafficking, but walk a bit further and this rough area also boasts the largest urban vegetable garden in Latin America.

New tool to accelerate drug discovery

Inside your body on the surface of cell membranes, a metaphorical communication and traffic network is underway as hormones—or chemical messengers—bind to cell membrane receptors to fine tune how the cell behaves. Once ...

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