On Today's Podcast

How extreme athletes like Alex Honnold keep their cool

Everyone has stressful moments. But for some athletes, keeping calm can be the difference between life and death.

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Most Recent Broadcast

June 5, 2026

Up to 94% of Neanderthals suffered at least one traumatic injury in their lifetime. How did their healthcare keep up? Plus, a Nigeria-based molecular biologist breaks down the current Ebola outbreak, and what's needed to improve disease monitoring across Africa. And, despite the scorching, toxic conditions on the planet Venus, some scientists want to look there for life—in the clouds.

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Segment

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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