The headline reads: 'Satellite images show continued breakup of two of Greenland's largest glaciers.'

What worries Jason Box, an associate professor of geography at Ohio State, and his colleagues, graduate students Russell Benson and David Decker, all with the Byrd Polar Research Center, even more about the latest images is what appears to be a massive crack further back from the margin of the Petermann Glacier.

That crack may signal an imminent and much larger breakup.

"If the Petermann glacier breaks up back to the upstream rift, the loss would be as much as 60 square miles (160 square kilometers)," Box said, representing a loss of one-third of the massive ice field.

Meanwhile, the margin of the massive Jakobshavn glacier has retreated inland further than it has at any time in the past 150 years it has been observed. Researchers believe that the glacier has not retreated to where it is now in at least the last 4,000 to 6,000 years.

Friday night environmentalism.

* Researchers at MIT have apparently achieved a major breakthrough in battery technology, making solar that much more practical as a potential alternative energy source for the post-cheap-oil world. More at MeFi and Daily Kos.

* Unprecedented warming, melting forces Arctic tourist evacuation. Global warming is a myth.

* How much oil can be found in Americans’ car — through more efficient driving and better vehicle maintenance? Using current numbers from the Bush DOE and EPA , the answer appears to be some 2.5 to 3 million barrels a day — 20 times what could be found if we ended the congressional moratorium on offshore drilling and three times the oil we are likely to find in the Arctic National Wildlife Refuge.

* And Climate Progress demystifies the French nuclear power system, elaborating on just what it would mean for the U.S. to adopt a similar program here:

"If France can produce 80% of its electricity with nuclear power, why can’t we?"

McCain seems to forget we are a much, much larger country than France. Heck, we already have more nuclear reactors than they do. To achieve McCain’s goal, we’d need 500 to 700+ new nuclear reactors plus 5 to 7 Yucca mountains, at a cost of some $4 trillion. Not to mention the soaring electricity bills Americans would have to suffer through, with electricity from new nukes projected at some $0.15 a kilowatt hour — some 50% higher than current national rates — not even counting transmission (or reprocessing).

There's more at the link, particularly some needed stats on the subject of nuclear fuel recycling and nuclear safety. I've been warming to the possibility of nuclear energy as an unavoidable component of our attempts to keep technological civilization afloat; maybe I'll have to rethink that...