Did you know blue was the last color to arrive in most languages? Blue was not an obvious color in nature and humans hadn't identified the big blue sky or the deep blue sea yet. Blue may have been late to the world of color but it quickly became the fave.

Radiolab's podcast "Why Isn't the Sky Blue?" includes the history of the blue. Side note: did you know that today is a blue moon? Next blue moon will not happen until 2015.

 

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