Astronaut Foods supplies NASA with its space dessert, and now it can provide you with yours. To create its signature frozen snack, the ice cream is put in a vacuum chamber and frozen until the water crystallizes. Then the air pressure is lowered, forcing the air out of the chamber. From there, the heat's turned up, vaporizing the ice, while a freezing coil traps the vaporized water. After repeating this process for hours, the result is a freezer-dried slice of ice cream fit for astronauts, simple earth-bound humans, and everyone in between.