In “A Geographer’s Perspective on the Existence of a Topographic Signature of Life,” CAST student, Ryan Erickson, examines how living systems might leave measurable imprints on Earth’s terrain. Using geographic tools, he explores how advances in remote sensing reveal the interactions between life, landforms, and climate. The piece suggests that recognizing these “topographic signatures” could transform how we understand ecosystems and even guide the search for life on other worlds. Read the blog post here.