How Do They Do It?
An insider's look at the engineering and scientific miracles behind the things that form the modern world.
17. Freshwater Pearls, Knives, Hippo Roller
0.0Dec 19, 2017 · 22 min
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?