From movies to music to workout classes, the Bollywood craze has been slowly taking over the West in the last few years. But what exactly is Bollywood?

In this audio story, Ampersand's Devika Girish demystifies everything you need to know about India's most popular film industry: the origins of its name, its history, and the "secret sauce" that makes it special. Featuring Dr. Priya Jaikumar.

Reporter: Devika Girish