1. Humans, curious and intelligent creatures, have made countless contributions to the humankind via scientific testing throughout history. Although these contributions brought about both great and awful consequences, humankind has reached today’s technology and advancement thanks to experimentation. Animals which have been the number one subject on experimentations as a mean of learning more about the world led to vivisection. Consequently, animal testing, also known as in vivo testing, has been a highly controversial topic in terms of ethical terms in society. It is taught to be inhuman, cruel and not a necessity; however, animal testing is a sacrifice that should be made since animal testing helps researches to find life-saving drugs and treatments, enhances the safety of the products being released and improves both human and animal life.