The only way to prove how effective something is going to be on humans is testing it on humans. Some people think that is not ethic, but “human testing” is more ethic than animal testing. Why? The difference between animal and human testing is that the human (or person involved) is a volunteer, instead of animals that are forced. Animals do not understand why they are behind bars, or why they are bleeding, losing hair, getting blind, dying, feeling lonely, hungry or scared. Today science has many other alternatives instead of animal testing that are ethic, like in vitro testing, computer modeling and, of course, research with human volunteers. Alistair Currie said: "Why conduct tests on the wrong species when sophisticated computer model, more