The opening episode of the series has been shot completely in the dark - revealing how an African leopard uses its specially adapted eyesight to prey on sleeping monkeys.
"The thermal cameras now are stunning, the detail you can see. You can see the fur, you can see the whiskers of animals, so that technology has opened up that whole new world to us," Scott Alexander, series producer, explained.
To capture some of the sequences the team have gone to extra lengths. For episode four, 'Cold', sleeping pods were specially designed so that the camera crew could remain out on the ice in Svalbard, Norway for days at a time tracking a polar bear.
As a result the team were able to capture a polar bear hunting reindeer inland - a behaviour they think it has developed as melting sea-ice has made it harder to hunt seals. ...
Fascinating!
“Never wrestle with pigs. You both get dirty and the pig likes it.” ― George Bernard Shaw