A look at one of the weirdest reptiles on Earth - New Zealand's tuatara. How did it survive when most dinosaurs were driven to extinction?

A look at the surprising clues that help to explain the kiwi's history and why it evolved into such an odd bird. Plus, we find out how the secret to the kiwi's success became its gravest threat.

Wildlife must adapt or die in New Zealand's dramatic landscape. How have its animals adjusted to one of the most geologically unsuitable places on Earth?