"15 Life Changing Inventions Made by Mistake."

http://www.businessinsider.com/these-10-inventions-were-made-by-mistake-2010-11

Living in a world of perfect robots, there would be little to no errors/mistakes. Though I found this website that shares 15 life changing inventions made by mistake. Why would we want to live in a perfect world when many of our favorite things were invented by mistake!