Discovery in action.These words describe what we do at PNNL, which has been operated by Battelle(Offsite link) and its predecessors since our inception in 1965. For more than 50 years, we've advanced the frontiers of science and engineering in the service of our nation and the world. We make fundamental scientific discoveries that illuminate the mysteries of our planet and the universe. We apply our scientific expertise to tackle some of the most challenging problems in energy, the environment, and national security.