TED-Ed

Mel Rosenberg: What causes bad breath? (2015x37)

Ημερομηνία προβολής: Μαρ 31, 2015

Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath — and what you can do when it strikes you. [Directed by Andrew Foerster, narrated by Addison Anderson, music by Devin Polaski].