A remarkable new story is unfolding in the Arctic. As the ice melts and polar bears struggle to survive in a fast-warming world, another animal is taking over the polar bear's once dominant role as top predator. An ever-increasing number of killer whales - or orcas - are appearing in Arctic waters in the summer months, attracted to these huge hunting grounds by the growing expanses of open water and attacking the same prey animals polar bears once survived on: seals, narwhal, belugas, and bowhead whales. Polar bears may be classified as marine mammals, but they are not adapted to hunting in the water despite being able to swim huge distances. They need the ice to hunt and as it vanishes they can no longer reach their traditional prey. And they are certainly no match for the world's greatest aquatic hunter - the killer whale. As the polar bear's world is shrinking, the orca's is growing.
The story of a hardened army Sergeant and four of his men from their first fight at the Kasserine Pass after the invasion of North Africa through to the invasion of Sicily
Line Of Fire is history with a difference. The great battlefields of war are presented in a unique animated environment providing new insights into military history's most compelling events. Each powerful episode combines informative graphics with atmospheric recreations and archive footage to analyse every facet of famous battles from the medieval period to modern times. Series also features authoritative comment by leading military historians from the Royal Military Academy, Sandhurst. A Cromwell Production in association with The History Channel UK.