Disappearing glaciers: Before and after views of Mont Blanc

Disappearing glaciers: Before and after views of Mont Blanc - Bulletin of the Atomic Scientists: A century ago, pioneering Swiss pilot Walter Mittelholzer took aerial photos of Europe's highest mountain and its glaciers in his biplane. Two scientists retraced his steps today, shooting from the same positions. The side-by-side comparisons of ice loss? Stunning.