When you think of icebergs, you probably picture a whitish-blue hue. But did you know that some icebergs in Antarctica are actually green? The emerald-colored formations have fascinated sailors and scientists for decades. Now, researchers may have figured out what causes these colorful curiosities. Here’s a clue: What do you…

Scientists on a NASA research plane in October 2018 took a photograph of a strange-looking iceberg floating in the Weddell Sea off Antarctica. It had a flat surface, vertical sides, pointed edges, and sharp corners. This kind of iceberg has a special name: tabular iceberg. The one in the NASA…