An iceberg that's tipped over reveals a bottom of green ice.
Source: Betty R/Fllckr
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 get when you mix yellow and blue?