If Nothing Exists Outside the Universe, What Is Space Expanding Into Really

In this video, we break down what scientists really mean by cosmic expansion, why the universe doesn’t need an “outside” to grow, and how space itself behaves very differently from everyday objects. We’ll explore common misconceptions, use mind-bending analogies, and explain concepts from general relativity in a way that actually makes sense. You’ll learn: Why expansion doesn’t mean the universe is moving into empty space How space itself can stretch without an edge or boundary What physicists mean when they say the universe might be infinite Why this question still confuses even professional scientists