Two enormous atmospheric vortices with very complex shapes and behaviour rotate vertically over the poles of Venus, recycling the atmosphere downwards. The vortex at the North pole, shown in this artist's impression, is the only one previously studied in some detail and has a peculiar 'double-eye' shape, surrounded by a collar of hot air. This vortex completes a full rotation in only three days. Venus Express' observations will help understand how the stormy atmospheric circulation on Venus work.