For all of recorded human history, there have been people who looked up to the sky and wondered, "what if?" What if there's more intelligent life out there in the vast reaches of space, and what if that intelligent life wanted to visit the planet we call home? Unidentified flying objects continue to fascinate people today. Even with major advances in technology that lets us understand our galaxy, surrounding planets, and beyond better than ever before, the questions of "what if" still remain.