Art going back millennia seem to suggest UFO-like forms in various human cultures’ artworks. Whether these are allegorical and suggestive of more mundane meaning or are representations of actual human observations before the modern era we can never know. In the modern era of cameras and scientific observation techniques we have no publicly-known direct evidence of UFOs or alien civilizations.

But there are patterns over time to the observations, and these patterns suggest aliens interested in the Earth are so far not hostile and seem much more interested in observation than any kind of interaction.

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