Something is wiping away all of the craters on dwarf planet Ceres

Ever since NASA’s Dawn spacecraft started snapping pictures of the dwarf planet Ceres in the Asteroid Belt in 2015, scientists have been perplexed by the space rock’s relatively smooth surface; the object should have way more impact craters than it does now. To get to the bottom of this mystery, scientists have used computer simulations to model how Ceres most likely evolved over time, showing just how many different types of craters the dwarf planet should have on its surface. Many of the craters predicted in the models have seemingly been erased, meaning that some kind of major geological activity has wiped them away.