When looking at visual timelines spanning from the 19th century to the 2010s, what stands out most is how drastically physical descriptions vary from one era to the next. This leads me to wonder what is truly happening during these encounters. On one hand, it is possible that these phenomena have been visiting us for so long that they have become woven into our culture and folklore over generations. Alternatively, perhaps what we are interacting with is so radically alien that human perceptio...