... people, like Morrison, are convinced that to restrict research with animals would prevent discoveries that would benefit humankind. Animal experimentation has enabled progress in many aspects of science for humans and it has led to many discoveries such as antibiotics, vaccines, diabetes research, organ transplants and so on. The benefits for animal experimentation - acquisition of new knowledge and development of new therapies - however have a cost in animal suffering. It is proven that certain animals, such as mice and primates have emotions. However, even if those animals can feel fear, anxiety, boredom and isolation in the laboratories, many people believe that a certain form of cost-benefit analysis can justify the use of animals. The main argument to justify the inhumane use of animals is that evolution has placed humans on top, so it is natural for us to use other creatures. In response to this simplistic argument, one ...

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