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Cancer

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mouse breast tumor

AIR SUPPLY  Depriving some cancerous tumors, such as this mouse breast tumor, of oxygen by cutting off blood vessels (red) is one treatment approach. But some oxygen-starved cancer cells (green) can become more aggressive.

telomerase

HANDY ADD  Telomerase (bottom structure), a complex of proteins and RNA, adds DNA to telomeres (green caps), the ends of chromosomes (blue X’s). The telomeres shorten when cells divide.

cup of coffee

COFFEE BREAK  Drinking coffee has a number of health benefits that may outweigh its uncertain cancer risks, studies have shown.

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