Mel Rosenberg | TED-Ed
View full lesson: http://ed.ted.com/lessons/what-causes…
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.
Lesson by Mel Rosenberg.
Animation by Andrew Foerster.