Look at Greenland on a world map and it looks massive — sometimes even bigger than Africa. But that’s a map illusion. Greenland is actually about 836,000 square miles, far smaller than it appears. It’s part of the Kingdom of Denmark, yet it sits much closer to Canada than Europe and is geographically part of North America. Here’s where it gets extreme. Nearly 80% of Greenland is buried under ice, making it the second-largest ice sheet on Earth after Antarctica. If that ice ever melted completely