Don't Call It Dirt: The Surprising Science Of...

Around the world, the planet’s freshwater is getting saltier. And it’s because of people. For decades, salting roads, fertilizer run-off and evaporation driven by human-caused climate change have upped the salinity of lakes, rivers and groundwater. All that salt is detrimental to ...  Show more

Groundwater is responsible for about half of the water people use globally. It’s drying up. Hayes Kelman started noticing the family farm in western Kansas was slowly getting less water around the time he was in high school. Now, as an adult and co-owner of Kelman farms, he is ac ...  Show more

From nourishing our foods to storing massive amounts of carbon, soil is teeming with diverse microbial life that could slow global warming. Climate change scientist Jane Zelikova calls for agricultural practices that protect Earth's soil by growing climate-adapted crops that don' ...  Show more

From our planet's underwater caves to its ancient soils, there are entire worlds right beneath our feet. This hour, we explore the subterranean forces that shape our lives above the ground. Guests include cave diver Jill Heinerth, death care advocate Katrina Spade, soil scientist ...  Show more

There’s two times more carbon in the earth's soil than in all of its vegetation and the atmosphere -- combined. Biogeochemist Asmeret Asefaw Berhe dives into the science of soil and shares how we could use its awesome carbon-trapping power to offset climate change. “[Soil] repres ...  Show more

Original broadcast date: March 11, 2022. From our planet's underwater caves to its ancient soils, there are entire worlds right beneath our feet. This hour, we explore the subterranean forces that shape our lives above the ground. Guests include cave diver Jill Heinerth, death ca ...  Show more