** The existence of Intelligent Extraterrestrial life is a common topic for Science fiction - stories, movies or even discussions. There are various visions of an alien proposed - doomsday / apocalypse themed movies portray them as reptiles with high frequency reproduction capabilities. However, few other more benevolent themes like the E.T. or Avatar show them as humanoid. Which of these two versions are more likely to be true? Let us look at it from another perspective, what are some of the characteristics of an intelligent animal? Some which come to mind are [ Source ]: The use of tools The ability to learn and remember (obtain knowledge) through experience, study, or instruction The ability to communicate (the ability to give and receive information) The ability to solve complex problems Humans have fingers which gives them a lot of flexibility to handle complex tasks such as writing or drawing art. We can't be exactly sure whether our fingers evolved by usag