Ep 1. The Kiwi

The Kiwi is a bird that has thrown out the rulebook of bird biology. It doesn't fly, lives in the dark, and resembles a mammal more than anything bird-like. But how did a flightless bird find itself on islands in the middle of the ocean? Distant relatives from the cassowary to the moa hold surprising clues to the kiwi's own history - and why it evolved to be such an odd bird.