Scientists have long thought that the dwarf planet Ceres might hold some form of water, but theyve only had indirect evidence at best — until today, that is. An ESA-led team has used signal fluctiations to confirm that the asteroid belt planetoid is spewing water vapor from two points on its surface, creating both ice and a rudimentary atmosphere. It isnt clear whats producing the vapor, although researchers believe that geysers, thawing or icy volcanoes may be responsible.