
Why is the sky blue? That question is probably the most frequently ejected from the mouths of children. Often improvised answered by parents, for example, “had been created that way.”
But, have you ever really intrigued to find an answer? Really since the first heaven on earth is blue?
The answer may not be as simple as your assumptions. According to a recent study, it is associated with rocks, phosphorus, algae immemorial.
About two million in the first year since the earth is created, the possibility of an orange sky. Although no one knows for sure. However, based on the chemical composition at that time, most likely the main components of the atmosphere is methane (CH4), which covered the earth seems strange.
Currently, the components of the atmosphere composed mostly of nitrogen and oxygen. The sun’s rays to create various colors of the rainbow, then spread through the air molecules. Blue is the color most reflected, so the human eye and then saw a beautiful blue sky. continue reading…




The United Nations predicts, in the year 2015 there will be approximately 358 thousand cities (big and small) around the world, 153 thousand of which are in Asia. From the hundreds of thousands of the city, 27 of which are mega-cities, and 18 of them were in Asia. One of the metropolis that is Jakarta.