Our science editor explains why he's travelled to the 'polar bear capital of the world' to bring us this extraordinary series
In his first report from Churchill, Canada, Lawrence McGinty meets the bears and introduces the experts who study them
In his second report, Lawrence McGinty watches as a hungry bear that strayed into town is sedated and airlifted back to the wild
In his third report, Lawrence hears from the Inuit community who are unhappy their hunting practices are being restricted
In his final report, Lawrence heads to Cape Churchill where the polar bears start their journey onto the sea ice to feed
Scientist Martina Tyrrell explains the multiple roles of the polar bear trophy hunt
Two leading scientists, Andrew Derocher and Ian Stirling, give their findings on Western Hudson Bay's polar bears
PlayResearch by scientists shows that global warming is having a grave impact on the planet
PlayIn Antarctica we show the devastating effect that global warming poses to the world's ice
PlayMild winters and global warming have a devastating effect on Polar bears in the Arctic
PlaySee Lawrence's route as he tracks the polar bears across Hudson Bay in Canada
Updated! See more amazing photos from the team as they track the polar bear across shrinking ice
From wildlife photographer Daniel Zatz
A word from its President, Robert Buchanan
Find out more about the organisation here
Questions answered by Polar Bears International
See animated Nasa ice maps
Want to follow in Lawrence's footsteps? Go on a polar bear tour...
