Three for Wednesday

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.