Redwood trees have roots only ten feet deep. For a tree that grows as tall as the statue of liberty, that should be a problem…This episode is about why it isn't.

We explain how redwoods manufacture the fog that feeds them, what a banana slug actually does for a forest, and what the Yurok people understood about these trees long before anyone else was paying attention. And we tell the story of four women — Laura Mahan, Lady Bird Johnson, Julia Butterfly Hill, and Amy Cordalis — who have spent the last century making sure these forests survived.