The "do they or don't they exist" debate won't be settled until someone from far away asks to be taken to our leaders. And the controversy makes it easy to forget that a UFO isn't actually a ship full of little green men. It's a placeholder for a puzzle the mind can't solve. So, it's also easy to forget that, much like the Insane Clown Posse observed about miracles, UFOs are all around us.

From weird drones to cheeky satellites to things that manifest themselves to the naked eye as little more than plumes of smoke, the skies can be a mysterious, congested place. Here, we take a look at the most striking curiosities of aviation, both foreign and domestic, including actual flying saucers.

That's the trouble with aliens: the misdirection. You spend too much time tracking down intergalactic visitors and you'll miss the oddities that humans invented for getting around our home planet.

Above: The best engineering minds in two countries couldn't quite figure out how to make the Canuck Flying Saucer work. A joint venture in the 1950s between the U.S. Army, U.S. Air Force and the Canadian aviation company Avro, the VZ-9 Avrocar was supposed to be a "revolutionary" supersonic ship that brought extraterrestrial style to the military-industrial complex.

The 18-to-25-foot pancake was to lift off vertically, thanks to a five-foot fan in its belly. The "focusing ring" around its exterior would push air outward in the opposite direction its pilot wanted to fly. Manufacturers called it "Ground Effect Takeoff and Landing," or GETOL.

And it did pretty well if you only wanted to go five or six feet off the ground. Higher altitudes would cause the craft to pitch wildly, a flaw its engineers couldn't overcome. After about 10 years and as many million dollars, the military pulled the plug in 1960. But visitors to the Army's transportation museum at Fort Eustis, Virginia, check out the prototype and imagine what might have been.

Photo courtesy of Wikimedia

Authors: Spencer Ackerman

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