So every time you have one of these impacts, a very thin layer of ice grains is spread across the surface, exposed to the heat of the Sun and to the space environment, and eventually sublimated or lost to other environmental processes. Dana Hurley More Quotes by Dana Hurley More Quotes From Dana Hurley This research is telling us that meteoroids are doing some of the work for us and transporting material from the coldest places to some of the boundary regions where astronauts can access it with a solar-powered rover, it's also telling us that what we need to do is get on the surface of one of these regions and get some firsthand data about what's happening. Dana Hurley top-news