Vivisection, the practice of animal experimentation, is one of the worst forms of animal abuse. Throughout the history of animal testing, animals have been used by analysts starting from Aristotle (384-322 BC), even though anti-vivisectionists are mostly salient in the Victorian period. In recent years, with the rapid development of advertising and marketing, animal testing became one of the most referenced ways for the organizations that want to learn about the efficiency and harmfulness of their product or medicine. In the U.S., every year over 25 million animals are used in medical research. The practice of using animals in medical research has come under harsh criticism by animal rights organizations like People for the Ethical Treatment
