This April, four young people will attempt something truly unique: to trek to the North Pole and lower a flag 4km to the seabed. Attached to the flag will be a capsule containing more than two and a half million signatures calling for a sanctuary in the uninhabited area around the pole. Leave a comment to encourage them on their gruelling journey, and follow their progress at facebook.com/arctic.rising The team is not made up of Arctic explorers but members of a global movement three million strong. They are Ezra Miller, actor/musician from New York, USA, Josefina Skerk of the Sami people in Northern Sweden, Keira Kolson, a Tso'Tine-Gwich'in youth from the Northwest Territories, Canada, and Renny Bijoux from the Seychelles. http://www.SaveTheArctic.org Timelapse footage Helheim Glacier: Gordon Hamilton / University of Maine