Much animal experimentation is defended by its apparent success in terms of increasing medical knowledge. This study investigates whether biomedical research using animals is, in fact, scientifically justified.

Questions about the scientific and moral status of biomedical experimentation are hotly debated in the media and in professional circles. The outcome of this debate will shape future public health policy. The authors expose the weaknesses in both the standard defense and standard criticisms of animal experimentation. This thorough investigation of one of today's most fiercely debated questions yields some unexpected conclusions.