You may think of data visualization and statistical graphics as relatively new subjects of study. And it’s true, computer-generated visualizations are newborns to the field. But at the root of data visualization is a long, rich tradition of humans using pictures in artful, creative ways—from early maps and statistical graphics to thematic cartography, medical and astronomical charts, and more—to convey scientific and statistical data to each other visually. York University professor and data visualization specialist Michael Friendly joins us to share highlights from The Milestone Project: a visual (of course) compendium of significant events—digital and otherwise—in the history of data visualization.