Arctic sea ice is pulling a Benjamin Button. It's been getting younger. But while that's a fate some would relish, it's not necessarily good news for ice, as it's youthful appearance could speed its demise.
The National Oceanic and Atmospheric Adminstration has released an animation showing the decline of old sea ice since 1987, the first year for which accurate data is available on ice thickness. It shows a region of change in terms of the long-term trend as well as season-to-season fluctuations.