GEO - Earth - is a word that simultaneously signifies something vast and elemental. It refers to both the planet on which we live and the soil that sustains us. GEO is the physical and representational bedrock of landscape architecture - the foundation of many disciplines from which we draw our knowledge. Geography, Geology, and Geometry, in particular, are fundamental to our discipline's intellectual core. And now, we seem ever more entangled in GEO as some scholars across the sciences and humanities argue that humans should be recognised as agents of change at geologic time scales.