It took two and half years filming with 40 hidden cameras in one of the world’s most hostile terrains…
But, for the first time in history, Frozen Planet II documentary-makers have captured two of the world’s rarest big cats covering each others tracks.
The Amur Leopard, the rarest big cat in the world, and the gargantuan Siberian Tiger - the largest big cat in the word - were caught on camera tracking each others footprints as they hunted for the same animals.