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A Warming Effect Photos

One hundred years ago in this spot, Pelley and Cassasa would have been covered by a glacier. "I think it’s a very clear picture that the world is getting warmer and that the impacts that were projected even 10 or 20 years ago are happening right now,” Casassa explains.

(Photo: CBS/Solly Granatstein)

Read Story STORY: The Age Of Warming

View Interactive PHOTOS: Pelley's Arctic Journey