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It's a Small World

This year's very best in microscopic photography

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MAGAZINE HIGHLIGHTS

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A Blood Test to Root Out Cancer

Researchers work to fine-tune a test that could better detect lingering disease in cancer patients.
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Long in the Tooth

Teeth, like trees, grow in rings. Reading this record may expose new links between toxins and disease.
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Whatever Happened to the Future?

Jetpacks, flying cars and other cool inventions still aren't standard issue.
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