The Extreme Physics and Chemistry (EPC) community of the Deep Carbon Observatory (DCO) is an international collaboration of geologists and geophysicists who have come together to transform our understanding of the unique physical and chemical properties of the 90 percent of Earth’s carbon estimated to reside in the planet’s high-pressure, high-temperature interior. EPC researchers study the diverse variety of forms deep carbon takes—solids, magmas, melts, low-density fluids—and examine the physical and chemical transformations carbon undergoes as it rises from the core to the surface and falls from the surface to the core. This grant provides two years of continued core support for the EPC as it moves toward completion of its ambitious research agenda.