NBC: Does the retreat of glaciers on the West Antarctic Ice Sheet mean we're in for an imminent climate catastrophe? The short answer is no. Is the ice sheet collapsing? That depends on your definition of "collapse." Are the two studies documenting Antarctica's meltdown worth all the buzz they've generated? Yes.
Here's a reality check on some of the questions raised by this week's studies:
What's happening to Antarctica's ice?
The continent's glaciers are in a constant state of flux, Penn State...