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at home tests for telomere length

JUST A NUMBER  Several companies offer at-home test kits for telomere length. Send in a blood sample and, these companies claim, they’ll tell you if you are older or younger than you think. Test kits also come with advice for maintaining the ends of your chromosomes.

E. coli

BAD BLOOD A strain of E. coli (computer-generated image above) that causes severe diarrhea can latch onto intestinal cells more easily in people with type A blood, a discovery that hints at a potential vaccine.

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.

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