For those interested in the history of political cartoons, Nature has published an interesting interview with a historian about cartoons from the 18th and 19th century that provide snapshots of social and political debates around the emergence of modern research. The conclusion shouldn't be surprising: pictures are an extremely effective way of conveying a message.
The above illustration by James Gillray from 1802 explores fears about using cowpox to vaccinate against smallpox. The people in the image are sprouting cows on their bodies, reflecting the fear at the time of putting a substance from another animal in your body. Credit: Library of Congress, Prints & Photographs Division
Read the full interview here.