Metamorphosis: Soldier fly and desert beetle - a podcast by BBC World Service

Erica McAlister on the innocuous wasp-like black soldier fly, a crown jewel of a fast-growing insect farming industry that's addressing the urgent need to find cheap clean protein. And how Namib Desert beetles have evolved in a very special environment, where the only source of water exists in the air.

(Image: Desert beetle in Namib desert. Credit: Martin Harvey/Getty Images)

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