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I’m not getting any younger. And I’m greedy for not only a long life – but a long, healthy, productive one.

So I was interested in a piece we published this week by Aditi Gurkar, a scientist interested in redefining “age.”

Age is not just a number, writes the assistant professor of geriatric medicine. Gurkar explains that scientists are searching for a “unique fingerprint for biological age,” including epigenetic clocks and zombie cells.

Later this week, we’ll bring you stories about the many forms succession can take, antisemitism on Twitter and the physics of superconductors.

Emily Costello

Managing Editor

Readers' picks

Healthspan measures incorporate quality of life in ways that lifespan does not. Ira T. Nicolai/The Image Bank via Getty Images

Are you a rapid ager? Biological age is a better health indicator than the number of years you’ve lived, but it’s tricky to measure

Aditi Gurkar, University of Pittsburgh

Aging is a major risk factor for many chronic diseases. Figuring out what influences longevity and how to identify rapid agers could lead to healthier and longer lives for more people.

Editors' picks

A U.S. surveillance drone flies over the USS Coronado in the Pacific Ocean during an April 2021 drill. U.S. Navy/Chief Mass Communication Specialist Shannon Renfroe

Downing of US drone in Russian jet encounter prompts counterclaims of violations in the sky – an international law expert explores the arguments

Ashley S. Deeks, University of Virginia

International law states that states have to operate ‘due regard’ for the right of nations to fly drones above international waters. Washington claims Russia violated this standard in incident.

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