On Today's Podcast

Teasing Apart The Causes And Early Signs Of Parkinson’s

Some Parkinson’s patients may experience strange symptoms, like smell loss and sleep disorders, decades before diagnosis.

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January 16, 2026

Some Parkinson’s patients may experience strange symptoms, like smell loss and sleep disorders, decades before diagnosis. Plus, a Pompeii construction site preserved in ash reveals secrets of the famously durable Roman concrete. And, Greenland sharks live for hundreds of years, but their eyes never seem to get old. What can they teach us about aging human eyes?

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16:37

Redefining the Kilogram

All the scales in the world are calibrated against a 125-year-old chunk of metal in a vault on the outskirts of Paris. Now scientists are looking to redefine the standard of what “kilogram” really means.

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