December 21, 2009 6:30 AM

Arctic research pushes scientists to extremes

If you want to know how polar bears are doing, it's not enough to spy on them with satellite telemetry and other technology. You have to go where they live. To get some answers, they traveled to a part of the world few get to see, and far fewer get to see from beneath the sea ice. Or would want to.

Related content

Suggested for you



Nation & World Videos