Animal testing
Animal testing for biomedical research dates to the writings of the ancient Greeks. It is understood that physician-scientists such as Aristotle, and Erasistratus carried out experiments on living animals. After them, there was also Galen, who was Greek but resided in Rome, carrying out experiments on living animals to improve on the knowledge of anatomy, physiology, pathology, and pharmacology. Animal testing since has evolved considerably and is still being carried out in the modern-day, with millions of experimental animals being used around the world. However, during recent years it has come under severe criticism by the public and animal activist groups. Those against, argue that the benefits that animal testing provides for humanity are not justifiable for the suffering of those animals. Those for, argue that animal testing is fundamental for the advancement of biomedical knowledge.