There’s a lot about snow we don’t know. Where does it come from? Where does it go? What does it taste like? Admittedly there are tentative answers to these questions. But there are yet more complex ones like how exactly, on a microscopic level, snow melts in mid-air. That’s the focus of one project at NASA, the results of which are both practical and beautiful. Snow is a critical part of the weather system (did you know there’s a whole “cryosphere”), and the ways in which it forms and melts can help meteorologists predict, for example, the likelihood or severity of a storm.