Simparica Trio Dose Chart

Whether it's a political cartoon, a comic strip, or a portrait, drawing has the power to provoke thought, evoke emotion, and spark conversation. It taught me that creating the system is, in many ways, a more profound act of design than creating any single artifact within it. It recognized that most people do not have the spatial imagination to see how a single object will fit into their lives; they need to be shown. The science of perception provides the theoretical underpinning for the best practices that have evolved over centuries of chart design. It’s how ideas evolve. We see it in the monumental effort of the librarians at the ancient Library of Alexandria, who, under the guidance of Callimachus, created the *Pinakes*, a 120-volume catalog that listed and categorized the hundreds of thousands of scrolls in their collection.