Bruce Duensing at Intangble Materiality has another great post: The Theory of A Amphibious Extraterrestrial. There is a lot to consider, and it may seem, at first, "far out" but really, it isn't. Given the amount of data on USOs, the Navy's work/destruction/manipulations, myth, the work of scientists such as Dr. John C. Lilly, researchers such as Vallee and Sanderson, you realize it isn't that far out, and, regardless of your personal conclusion, the ideas Bruce presents are worth considering. There are also some interesting ideas concerning crop circles and sound in this article.
That's the thing about all this: entertaining ideas, speculating, following threads, taking long looks at what we see as we continue on the journey. Stopping to smell the esoteric roses. You don't know what you'll find, and sometimes what you find is surprising, new, and even wonderful.