Three links for this Wednesday.

* "A consensus has developed during IPY that the Greenland ice sheet will disappear." This and other terrible news on climate change from Newsweek's science editor Sharon Begley.

* California is facing a severe prison crisis, which the disastrous "three strikes" law will only make worse.

* Since Mr Obama took office, the rate of threats against the president has increased 400 per cent from the 3,000 a year or so under President George W. Bush, according to Ronald Kessler, author of In the President's Secret Service.

"We are cooling. We are not warming. The warming you see out there, the supposed warming, and I am using my finger quotation marks here, is part of the cooling process. Greenland, which is now covered in ice, it was once called Greenland for a reason, right? Iceland, which is now green. Oh I love this. Like we know what this planet is all about. How long have we been here? How long? No very long."

Ladies and gentlemen, the head of the Republican Party.

Greenland is melting. So is Alaska.

These are completely unconnected events.

Global warming is a myth.

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.