How Do They Do It?

Season 15 Episode 17: Freshwater Pearls, Knives, Hippo Roller

How do they grow America's only freshwater pearls in Tennessee? How are the world's sharpest knives made, and how do they forge the world's sharpest knives?

Genre:

Documentary

Seasons:

17

Episodes:

287

Cast:

Quality:

HD

Duration:

22 min

First Air:

2006

Rating:

7.5