Did you switched off on March 23? It was the Earth Hour global call for 2013. You missed that? Ohhh! You likely want to know before you go. Learn why we should massively follow this movement.
Sky’s not Blue
visualized by: Ajrdesign
It’s not a hype, not even a rumor. It’s simple physics that explain the blue – violet illusion. You must have heard that sky is not actually blue but rather colorless. Find here the reasoning.