The comet 67P has provided an avalanche of astonishing discoveries that may puzzle scientists for years to come. And one problem that will simply not go away is the seemingly impossible dunes, or dune-like ripples at the comet's neck. At its first observation, the feature drew virtual gasps of disbelief from scientists and science media. More recent, close-up images of the "impossible" dunes have only deepened the mystery. How does the electric universe explaining this baffling feature?