Ever wondered why some lakes are bright blue while others are green or brown? The answer lies in the way light interacts with ...
The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...
From ocean to sky, blue is seemingly everywhere - but it's one of the most difficult colours for nature to produce using pigments. Animals usually appear blue to the human eye because of microscopic ...
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