TheAtlantic.com has been running a series of charming infographics on topics ranging from hairstyles in the 20th century to the history of weapons over the ages. Created by Jackie Lay, a designer, illustration and art director for The Atlantic Magazine, the brief animated timelines combine flat-graphic illustrations with one inconsequential element in the picture showing subtle movement. A wisp of hair gently moving out of place. A cloud slowly passing across the sky. Steam lazily curling up from a hot cup of coffee. The movement isn’t part of the storyline, but it entices the viewer to pay closer attention. It carries the viewer into the next frame. Without that almost infinitesimal movement to grab the viewer’s interest, the image would be what it actually is: A still illustration. Animation doesn’t always have to be a full-blown Pixar-like extravaganza. Sometimes a little movement makes all the difference between stagnant and intriguing.