Arctic scientist David Barber shares the history of sea ice to shed light on its importance in shaping Earth’s future. This talk was filmed at TEDxUManitoba. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more about TEDxSHORTS, the TEDx program, or give feedback on this episode, please visit http://go.ted.com/tedxshorts.