LiveScience: News that the catastrophic collapse of the West Antarctic ice sheet is already underway, like other big reports about the southernmost continent, spur chatter and questions about what's really happening at the bottom of the world. We'll explain the reality behind some common misconceptions about big changes in Antarctica. 1. Antarctic ice is getting bigger, not shrinking! Yes, the Antarctic sea ice has been growing larger over the last few decades. But here's what people miss when they raise...