One could say that the universe isn't expanding into anything because the question implies that something exists "outside" the universe, which is nonsensical, as "outside" is a spatially relative ...

In CUriosity, experts across the CU Boulder campus answer pressing questions about humans, our planet and the universe beyond. Previously, astrophysicist Jeremy Darling tackled: “What is the biggest ...

The expansion of the universe is, in some ways, similar. But this analogy gets one thing wrong – while the dough expands into the baking pan, the universe doesn’t have anything to expand into.