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Could one pill help us live longer? Scientists and investors are racing to find a drug to slow aging, trying things like metformin and rapamycin. But the breakthrough might not come from humans.

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A composite image of Jim Dreeben doing lateral raises and squats.
Jim Dreeben, 83, works out outdoors all year round.
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A container of blood plasma is being extracted from a centrifuge for a medical procedure
Spinning blood in a centrifuge to remove the plasma can treat certain medical conditions, and some doctors are exploring the benefits for longevity too.
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Composite image of a headshot of Dr. Fay Couceiro, Professor of Environmental Pollution at the University of Portsmouth, and multicolored microplastics on someone's fingers.
Fay Couceiro shared how she reduces her family's exposure to microplastics.