Soon there’ll be more foreigners on earth than there are Americans. Foreignness is a planetary condition, and even when you walk through your hometown—whether that’s New York or London or Sydney—half the people around you are speaking in languages and dealing in traditions different from your own.
But there are still gravitationally bound systems, and they exist on small scales in great abundance, on medium scales in moderate abundance, and on relatively large scales in sparse but non-zero abundance. And it’s all part of the same cosmic story.
Ethan Siegel on dark energy, dark matter, and the fate of our expanding universe on Medium. Read the article.