01 Extra Graubünden is thawing up Around 17,000 BC: The entire Alpine region is covered by enormous glaciers (in German).Image: Archaeological Office Graubünden + Around 15,000 BC: The ice is beginning to retreat (in German).Image: Archaeological Office Graubünden + Around 10,000 BC: The glaciers are disappearing from the Alpine valleys. Plants grow and animals settle, followed by the first humans (in German).Image: Archaeological Office Graubünden +