Animal testing is at the center a heated controversy that has lasted for several decades.
Those that believe animal research is necessary are convinced that animals model the complex biology of human beings. Opponents claim that animal experiments do notwork, since the differences between humans and animals often result in an understanding ofanimals that does not directly apply to humans. Read on and see what you think. Much progress has been made in the last twenty-five years in the development of laboratory techniques used to study biological questions. The techniques used in molecular biology and cell culture have improved dramatically, and it is now possible to introduce DNA sequences into cell cultures and to study the effects of these sequences on individual cells.