Animal models are critical to the advancement of science. They are employed in the development of drugs, vaccines, and even medical devices. They have been used for hundreds of years and will be used for hundreds of years to come. However, there is hope with the development of more powerful computers and modeling software, renewable cell lines, and more sophisticated ex-vivo models. I believe that with time, animal testing will diminish, but I do not believe it will ever be completely eliminated as it is an extremely powerful tool in the development of new technologies, biopharmaceuticals, and devices.