Pure ice is blue because ice absorbs more red light than blue light. Most icebergs appear white or blue when floating in seawater, but since the early 1900s explorers have reported seeing emerald green icebergs around certain parts of Antarctica. A new study published in the Journal of Geophysical Research: Oceans suggests that the iron content found in marine ice is sufficient to explain the unusual color of these icebergs. Close-up view of an iceberg...
