Cynics continually try to explain away these events, while eyewitnesses couldn't be more certain of what they've seen. The most notorious UFO sightings in the world give backing to that when wondering if aliens are real, the answer may just be yes.
1. A civilian pilot’s Washington flight
While he first believed the flying objects to be military-owned, the government stated that no one had been near Mount Rainier that day. Following his description of the blue, glowing objects as "a saucer if you skip it across water," the phrase flying saucer was popularized.
2. Lights in the Rendlesham forest
Then, two days later, other military personnel said they experienced the same thing, this time armed with a recording device. On December 28, it was reported that a bright red light occurred, followed by a craft crashing into the forest. An Air Force commander then went up to the craft and supposedly encountered an alien of sorts. The Ministry of Defense completely denies these occurrences.
3. Green lights over a reunifying Germany
4. The ultimate cover up in Roswell
In 1947, a rancher was examining his pastures when he encountered a series of debris such as metallic rods and chunks of plastic. When soldiers from the Roswell Army Air Force Base where called in to retrieve the wreckage, headlines claimed that it was a cover up of a crashed UFO. In 1997, the government admitted to a cover up, but not of a flying saucer. History reports that in a report titled "Case Closed: Final Report on the Roswell Crash," the government stated that the debris was part of a top secret project using high-altitude balloons to check for nuclear tests done by the Soviets.
5. Kolkata's morphing UFO
6. When Texas lost electricity
7. The case of the disappearing pilot
8. Pilots thought they saw a UFO.
Though it was not clear exactly what the object was, HuffPost noted that the area where they were flying was near several Air Force Bases.
9. The New Jersey Turnpike sighting
10. Lubbock Lights
The Air Force later explained that the lights were likely due to the reflections from the underside of planes. But to this day, UFO enthusiasts aren't convinced.
Sign up here to get INSIDER's favorite stories straight to your inbox.