It's highly unlikely that humans and Earth's other inhabitants are alone in the universe.

And if aliens decided to take a trip to Earth, we would have so many questions, like, "Why here and now?" and "Have you really been abducting people for decades and doing experiments on them?" and "Are you dudes related those other extraterrestrials who may or may not be at a secret base somewhere in the deserts of New Mexico?"

The aliens would likely have a bunch of questions for us too, many of which would be about the current state of the world at large — though before we get to firing off questions at one another, we might have to figure out how to get around a potential language and communication barrier, like in the forthcoming film Arrival.

Here are a few things they'd likely find interesting if they were to stop by Earth and immerse themselves in humanity's society and culture.