Why does “United states” usually refer to the 50 states and Washington DC only, but does not include foreign territories like Guam and Puerto Rico?

As you know, our land is the melting pot of the world, which means we have ethnicities of…

Is it true that highly educated people very rarely have children before they turn 30?

https://www.theatlantic.com/family/archive/2023/03/polite-words-is-please-rude/673397/ I know I’ve consciously decided against including it in requests (even taking it out of email and…