A Cosmic Mystery That Defies Logic The universe is expanding—this much we know. But here’s the real mind-bender: if the universe is infinite, what exactly is it expanding into? Unlike a balloon inflating into the surrounding air or dough rising in a baking pan, the universe doesn’t expand into anything—it expands within itself. The Expanding Universe: A Concept Without a … [Read more...] about What Is The Universe Expanding Into If It’s Already Infinite?