"frozen Planet" The Last Frontier(2011) -

: In Alaska, scientists monitor the Northern Lights and launch rockets into them to study how they disrupt power supplies.

, where plastic camera parts frequently snapped and equipment froze solid. "Frozen Planet" The Last Frontier(2011)

: The first exploration and filming of the volcano's ice caves by a film crew. : In Alaska, scientists monitor the Northern Lights

: Hunters are shown scaling sheer cliffs to collect guillemot eggs, a vital but dangerous source of food. Modern Arctic Presence : : In Alaska

: Film crews collaborated with scientists to explore bizarre, crystal-filled ice caves inside this active volcano.

: The episode features some of the coldest permanent human settlements on Earth. Antarctic Exploration & Science :

The filming of this episode included several technical achievements for the BBC Natural History Unit: