People just do not know any better and as stated above, early scientists such as Aristotle and a few others who are still highly admired by society used live animals for testing when conducting various research experiments. This logically and undoubtedly has a huge impact on the beliefs of pro-animal testing believers.
Another cause of animal testing has resulted from researchers defending their actions by saying if animals were not used for testing, then there would be no other choice but to test on humans. When told this, a large portion of the population believes this because they are not aware of the solutions made possible in today’s society. When testing on humans is mentioned, negative thoughts come to one 's mind when in fact the way that humans would be tested on just have not been thoroughly explained.
An important relevant fact to the situation is most animals don’t react the same as humans do to a lot of drugs and chemicals being tested. A lot of people have been led to believe that the DNA in people and the DNA in the animals being tested are the same. Yes the DNA is similar, but slight differences can cause completely diverse results and reactions to the test at hand. The biggest effect of animal testing is the result of people believing animals are the only way to test which effects millions of animals, ranging from mice to even dogs and monkeys, being tested and the majority of them being killed each year. “An estimated 17 to 22 million vertebrate animals are used each year in research, education, and testing—less than 1 percent of the number killed for food...In fiscal year 1988, about 142,000 dogs and 52,000 cats were used in experimentation, with 40,000 to 50,000 of those dogs being bred specifically for research and the others being acquired from pounds. Between 50,000 and 60,000 nonhuman primates, such as monkeys and chimpanzees, are studied each year, many of them coming from breeding colonies in the United States” (NAP.edu). Another very important effect to