On Today’s Show

July 4, 2025

In this archival show, undersea archaeologist Robert Ballard shares adventures from beneath the waves and his love for deep-sea exploration. Plus, research suggests that we share parts of our microbiome with people in our social networks beyond family members. And, a book uses science and the benefit of hindsight to figure out how to survive some of history’s biggest disasters.

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Video

Breakthrough: Bitter Water

For Navajo hydrologist Karletta Chief, water is sacred. When a mine spill contaminated a vital river in the Navajo Nation, she decides to investigate the potential environmental and health impacts it had on her community.

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