In photos: Seeing blue - Portland Press Herald
Blue skies were smiling and bluebirds were singing for Irving Berlin, but blue is actually nature's rarest color. Blue flowers are less than 10% of the world's 300,000 flowering plant species. Even some of the few animals and plants that look blue don't actually contain the color. Blue jays and Morpho butterflies, for example, have developed unique features that distort the reflection of light to appear blue. Humanity has been obsessed with blue for thousands of years, from ancient Egypt when blue, the color of the heavens, was used in temples, ceramics and statues and to decor...
Source: pressherald.com
