Geologists are increasingly able to visualize subducted slabs, enhancing their understanding of Earth's geological history over the past 250 million years. The 2012 Fall Meeting of the American Geophysical Union (AGU) featured a significant session on seismic tomography, showcasing advancements in the field since the late 1990s. The ability to process seismic "noise" and other refinements has made seismic tomography a powerful tool for geologists. Several posters from the 2012 and 2013 AGU meetings highlight these developments, demonstrating the progress and potential of seismic imaging techniques in unraveling Earth's complex history.