Life is the subject matter of many different fields.
It has been thought and many people have attempted to comprehend its real meaning. Although a satisfactory explanation has yet to be reached, there has been much literature on the subject. In bioethics, to know the forms of lives and their relations to each other has special importance. In this article, I will try to explore the philosophical and moral meaning of life, as well as its biological manifestations. I will present the stance of different philosophers and scientists, and analyse them to reach a conclusion.