Inspired by Lucy Jago's book about the Norwegian scientist Kristian Birkeland, who solved the mysteries of one of nature's most spectacular displays. 
Captivated by the otherworldly lights of the aurora borealis, Birkeland embarked on a lifelong quest to discover their cause. His pursuit took him to some of the most forbidding landscapes on earth, from the remote snowcapped mountains of Norway to the war-torn deserts of Africa.
 
A6 colour postcard with white border - fits inside a standard envelope (not supplied) -five for £5