The frozen pack ice in the Arctic Ocean makes it one of the most ... A site like this can be accessed only by an ice-breaker or by air.

Typically, research teams have been unable to access the central Arctic regions during winter due to the thickness of the ice. By sticking around for the full year and drifting with the ice pack ...

The sea ice that blankets ... were locked in pack ice for nearly three years during a vain attempt to drift across the North Pole. But the Arctic is a different ocean now. The air above it has ...