Do you think you need a degree in science to contribute to important scientific discoveries? Think again. All around the world, from Britain to Australia, in fields ranging from astronomy to zoology, millions of ordinary people take part in the scientific process. Working in conjunction with scientists in pursuit of information, innovation and discovery, these volunteers are following protocols, collecting and reviewing data, and sharing their observations. They are our neighbours, our in-laws, our office colleagues, our friends. The story of the social good that can result from citizen science has largely been untold - until now. Citizen scientists are challenging old notions about who can conduct research, where knowledge can be acquired, and even how solutions to some of our biggest social problems might emerge. Cooper reveals the crucial role that they play in gaining scientific understanding and putting that understanding to use as stewards of our world. Their stories will inspire readers to join other amateur scientists in making their own scientific discoveries.