Aliens are considered as hypothetical or fictional being from another world. Researchers are hunting for the biochemistry, life forms, habitation and appearance of aliens as how they look like? As far is known, the living organisms, currently known are made up of carbon compounds for basic structural and metabolic functions, water as a solvent, and DNA or RNA to define and control their form. So if extraterrestrial life exists, it maybe chemically similar though probably could be having different chemistries. In recent searches, silicon has been discussed to a great extent as an alternative to carbon. Silicon being of same group and being tetravalent is making researchers curious to unleash the mysteries as if it could become a backbone for living beings or not. And silicon is foraged by researchers as if a human can coax life to build bonds between silicon and carbon then nature can do it too for extraterrestrial life. Why is silicon an alternative? A carbon, silicon has sim...