Penn Jillete and Teller go beyond the word skepticism. Supported by the scientific area, this two guys open the eyes of their audience by revealing the truth that we did not know about certain topics. Religion, politics, enviromental issues are themes we as individuals not know entirely. I know it, you know it, every single one of us knows it; but, we let ourselves believe in a thing that we can not prove, and accept it as the reality and the truth. Penn and Teller don't, they research until the find what really happened or is happening. And when they find out, they release their truth and share it with their viewers, but they do not only lecture us about what they have found, they have science to establish it. And science is their main weapon to state their truth.