British explorers cut short trek to North Pole

A team of British explorers on a trek in northern Canada to measure the thickness of floating Arctic sea ice have abruptly ended their three-month expedition short of reaching the North Pole due to an early summer ice melt. Explorers Pen Hadow, Ann Daniel and photographer Martin Hartley stopped their arduous trek Wednesday, approximately 490 kilometers from the North Pole. The trio said Thursday that they made the journey over the past 73 days to measure the thickness of floating sea ice to provide data to scientists studying the impacts of global warming in the region.