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Preview: Top of the World

Name: Preview: Top of the World
Uploaded: 2016-07-29T10:24:00-0400
Duration: 33 s
Description: Sharyn Alfonsi goes to the top of the world to report on scientists trying to get to the bottom of climate change and sea level rise by studying one of the largest glaciers in the Arctic Circle. Watch Alfonsi's report on Sunday, July 31 at 7 p.m. ET/PT.

Sharyn Alfonsi goes to the top of the world to report on scientists trying to get to the bottom of climate change and sea level rise by studying one of the largest glaciers in the Arctic Circle. Watch Alfonsi's report on Sunday, July 31 at 7 p.m. ET/PT.