Music for Monarchs: A Conversation with Mark Lewis

In the first installment of our interview with composer Mark Edward Lewis, we asked how he pulled off such a stunning soundtrack for Metamorphosis, the new documentary from Illustra Media that documents the case for intelligent design from butterflies. This time we wanted to ask about one of the most noticeable aspects of the score: the African vocals.

Let's talk about the singers a bit. What made you decide to try African vocals this time?

Lad Allen, the producer-director, was...