> When we say we live in an expanding universe, we’re saying that the distances between galaxies, on average, grows with time. And that’s it. How could this be

> When we say we live in an expanding universe, we’re saying that the distances between galaxies, on average, grows with time. And that’s it. How could this be due to the expansion of space, which should expand our galaxy, and my foot-long ruler, to the same extent that it expands the empty space between our galaxy and the next?