Scientists have many big questions to tackle about the universe, including how big it actually is. But even the proposed answers aren't straightforward.

13.8 billion years ago, what we know as our Universe began with the hot Big Bang. It's been expanding and cooling ever since, up through and including the present day. From our point-of-view, we can ...

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 ...

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