*In 1972, Bernt Balchen predicted that the Arctic would be ice-free by the year 2000.<ref>https://www.newspapers.com/clip/110868583/north-pole/</ref> | *In 1972, Bernt Balchen predicted that the Arctic would be ice-free by the year 2000.<ref>https://www.newspapers.com/clip/110868583/north-pole/</ref> |