A huge crack, shown above to the left of the satellite image, has opened up in the Pine Island Glacier on Antarctica:

Scientists on an aerial survey of Antarctica have come across an 18-mile-long break in an ice shelf — a sign that the sensitive area is giving birth to an iceberg that will be larger than New York City. … Glaciers naturally give birth to icebergs, but scientists are concerned that warming temperatures might be destabilizing those in Antarctica and Greenland by eroding the ice shelves floating on water that hold them back up against the mainland.