“The Blue Marble is an image of planet Earth taken on December 7, 1972, by the crew of the Apollo 17 spacecraft at a distance of about 29,000 kilometers (18,000 miles) from the surface. It is one of the most reproduced images in human history.” [Wiki] We see our planet filled with life like no other planet that we know about. All life on earth are similar in that they contain genetic base pairs of A-T(U) and G-C, Adenine – Thymine(Uracil) and Guanine-Cytosine. The theory of evolution says our life started from small bacteria type life forms and evolved to more complex forms over millions of years.