We've come a long way from simple pie charts created on the server side. Today's browsers support complex interactive visualizations and it's technologies like SVG, d3.js, and JavaScript that make it possible. Scott talks with Observable's Anjana Vakil about the history of data visualization on the web, Mike Bostock's work on d3 at the New York Times, and how Observable is attempting to bring data, visualizations and code all together in one collaborative place.