Jamie Lee Curtis narrates this examination on the wondrous world of soil. A precious resource that may not always be at the forefront of people's minds, dirt is necessary for not only the survival of humans, but the planet as well. Follow experts as they travel from the vineyards of California to the plains of Kenya to detail dirt's history, functions, and why it needs to be conserved. 80 min. Widescreen; Soundtrack: English Dolby Digital stereo; deleted scenes; interviews.