So my roommate's friend saw something while driving

Like maybe we humans are wondering when first alien contact will happen, asking "So if there are aliens, how come they don't just introduce themselves face to face, once and for all?!"

But that is based on the fact that in our culture, being face to face and speaking verbally is considered the norm for a first meeting and the gold standard for communication. But maybe for visitors from another dimension (or planet), it's different. Maybe the default communication method is based on light signaling or something else, and they are scratching their heads wondering why we're not responding.

We may be like the proverbial 'two ships passing in the night.'

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