TED: Brian Greene: Is our Universe the only Universe?

"We learned that our universe is not static, that space is expanding, that that expansion is speeding up and that there might be other universes all by carefully examining faint pinpoints of starlight coming to us from distang galaxies.

But because the expansion is speeding up, in the very far future, those galaxies will rush away so far and so fast that we won't be able to see them. [...] So astronomers in the far future will see nothing but an endless stretch of static, inky, black stillness. And they will conclude that the universe is static and unchanging and populated by a single central oasis of matter that they inhabit - a picture of the cosmos that we definitely know to be wrong.

Now maybe  those future astronomers will have records handed down from an earlier era, like ours, attesting to an expanding cosmos. But would those future astronomers believe such ancient knowledge?"