Emergence of developed life in the Universe is very unlikely. Temperature suitable to keep water in a liquid state isn't enough. Many factors such as occurence of a big moon, atmosphere or proper gradient of Earth's axis of rotation towards ecliptic lead to leading life on Earth to the present form. Humans are special even among other organisms. They were the only ones to develop civilization and it took them thousadns of years. Dinosaurs lived for millions of years and only ate grass. We are really unique and we must not waste it.
