If the universe is 13.8 billion years old, why is the observable universe 46 billion light-years across? This video explains ...

Does the universe have an edge or does it go on forever? This video explores what science, cosmology, and physics reveal about the limits of space and what may lie beyond the observable universe.

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...