NEW YORK, May 16 -- RNAi just may be the string that pulls back the curtain on the secrets of aging and reveals a molecular fountain of youth: A team of modern-day Ponce de Leons at the University of California, San Francisco, report in this week's Science using the technology to identify transcription factors in C. elegans that, when stimulated, increase lifespan and stop aging.

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.