It's not hard to see how solid particles function at the lowest temperature of the three states: being cold, it is only natural that they huddle to keep warm, rub against each other for that spark of heat. It follows that the warmer you are, the less you need company; gas particles feel free to roam the universe, all space a balloon to press against and make rise. Perhaps, even now, buoyed by the push and collide of particles, our universe rises imperceptibly like a huge hot air balloon. Picture us going about our daily motions, unaware that with every movement we are higher up, the entire universe levitating, reaching for a certain something. Growing. Every year planes get closer to the surface of the Earth. The moon inflates, glowing brighter. And maybe the Milky Way gaining warmth, tearing itself away, testing the boundaries of its space.