Imagine living in a world without pain. You wouldnt get headaches or stomach aches, and it wouldnt hurt when you cut yourself or touched something hot. A pain-free world may sound wonderful, but if pain did not exist, our lives would be very dangerous. We probably wouldnt survive for long. We would certainly be less healthy. And, just perhaps, wed feel less good about ourselves. Learn about the science behind how our bodies are able to experience pain, the ways pain helps us to stay safe, and the ghastly reality of life before modern painkillers.