The use of animals in medical and other research has been a staple of modern scientific progress. In the early twenty-first century, biomedical research in the United States involves the use of several million animal subjects (mostly rodents) each year. With the rise of biotechnology and the techniques of genetic modification, the scientific use of animals will continue in novel forms. There are questions, however, about the reliability of information gained from animal experimentation, and whether it is morally defensible to exploit animals for the sake of scientific knowledge.

History

While animal experimentation might be thought of as a thoroughly modern practice, humans have been learning from animals since prehistory. Early human hunters' knowledge of the natural world was likely formed by their awareness of the life cycles and migration patterns of prey species. Prehistoric understanding of anatomy and physiology was no doubt the by-product of...