Subatomic particles are far too tiny to see, so over the years physicists have devised ingenious ways to detect and visualize them, often forming beautiful patterns and pictures in the process. From early experiments with cloud chambers to state-of-the-art animations of Higgs-boson decays, data visualization in particle physics has come a long way. Here are just a few of the most striking images of particle interactions - or "event displays" - from over the years.