S7·E14 – Battery Power, Chocolate, Toothbrushes
2010-08-27 • 22 min
How do they make toothbrushes; how do they produce millions of car batteries; and how are cacao beans transformed into chocolate?
2010-08-27 • 22 min
How do they make toothbrushes; how do they produce millions of car batteries; and how are cacao beans transformed into chocolate?