For example, in vitro method which involves testing human cells and tissues. Another example would be “Corrositex which uses a biomembrane and a chemical detection system that changes color upon contact with corrosive substances. In some cases, this could replace the use of rabbits in corrosivity research” (AAVS, 2014, Product Testing). Non-animal tests are widely available, more informative, less expensive and faster than animal tests. Sophisticated computer software and realistic human simulators are used in schools and universities to teach basic and advanced biological principles and medical procedures. “Today, one can even become a certified surgeon without harming any animals, and experience with animal dissection and experimentation on live animals is neither required nor expected of those applying to medical school” (PETA, 2014, Animals Used in Education). With alternatives, experimenters don't just have one chance to test something, they can do it multiple times without harming animals or animals.