Whether UFOs are actually alien crafts or not, they're extremely interesting to think about. No one knows exactly what they are (hence the name), but there sure are plenty of theories.
Theories like these range from believable, to terrifying, to laughably entertaining.
1. The Black Knight Satellite
Last week, we went in-depth into just what the Black Knight Satellite is (or what it could be). The short version is that the Black Knight is a large satellite that's believed to have been orbiting Earth for the last 300,000 years. No one knows how it got there, but it's been detected by NASA multiple times.
2. John F. Kennedy Killed By CIA
The only thing that conspiracy theorists love more than speculating about UFOs is speculating about JFK's assassination. According to some theorists, just ten days before he was killed in Dallas, President Kennedy demanded "full disclosure" from the CIA regarding their investigations into unidentified flying objects. He also ordered the agency to share all of their UFO data with NASA. To avoid having to disclose their alleged links to UFOs, the CIA had Kennedy killed.
3. The Hologram Plan
This one is weird. In 2009, a strange, blue light formed in the night sky over Norway. While the explanation is likely meteorological, conspiracy theorists declared it to be a failed attempt at implementing Project Blue Beam. The theory goes that the "New World Order" plans to show a holographic projection simulating an alien invasion as a means to seize power. Clearly, they are still working out the kinks in their plan.
4. Malaysia Airlines Flight MH370 vs. UFO
Theories abound about the mysterious disappearance of Malaysia Airlines Flight MH370. The most interesting one claims that it was abducted by a UFO. The proof that believers offer for this particular theory is that the Malaysian air force detected an unidentified flying object on their radar just before the plane disappeared. If that's true, this theory would account for the lack of physical debris usually found in the event of a plane crash.
5. America's Hidden Space Fleet
While the United States has one of the most sophisticated terrestrial militaries in the world, when it comes to space warfare, we're woefully unqualified. Or are we? According to some theorists, NASA's mission for space exploration is merely a front. Their real purpose is to build and maintain a fleet of interstellar war ships that are in orbit above Earth as we speak. The evidence offered for this supposed space fleet is a cryptic reference to something called the Solar Warden Program in a leaked document from the U.S. State Department.
6. 2012 Olympic Alien Invasion
The 2012 Olympic Games were a triumph of human achievement. However, if you were a UFO conspiracy theorist, it was anything but. According to these folks, the 2012 Olympic mascots somehow conveyed a hidden message about an impending alien invasion. Instead of rooting for their home teams, theorists were busy stocking their emergency bunkers. When the invasion didn't happen, it was, of course, classified as a conspiracy. This time, the perpetrators were the Free Masons.
7. Alien Jesus
One of the most widely circulated UFO conspiracy theories out there is that Jesus was actually an alien. This one falls into the Ancient Aliens category of conspiracies. While it seems far out, it would explain pretty much all of Jesus's miracles.
8. Nazi UFOs In Antarctica
In 1946, America mounted a large, unprecedented expedition to Antarctica. The official reason was to beat the Soviets there. However, Nazi supporters maintain that the expedition was mounted to destroy a secret Nazi UFO base located there. The theory continues, saying that the "attack force" was repelled by the superior Nazi technology. In reality, bad weather forced the expedition to make a hasty return.
9. General MacArthur vs. Aliens
During a 1955 speech, General MacArthur is said to have made a comment about Earth-wide war against aliens. He urged the world to unite because the next great war could be a battle for Earth's very survival. Conspiracy theorists believe this was a reference to some specific knowledge that MacArthur had about the existence of aliens.
10. NASA Sent Astronauts To Another Planet
While humans have only officially visited the moon, UFO theorists believe humanity has gone much farther. They claim that a dozen astronauts were sent to a planet 37 light-years away called Serpo during the Kennedy administration. They were part of an exchange program implemented by grateful aliens who were saved after their spacecraft crashed in Roswell, New Mexico, in 1947.
(via: List Verse)
Those are some pretty insane theories. While it's very easy to dismiss those theories as products of overactive imaginations, what if they aren't? However unlikely, there's still the possibility that one or more of them are actually true. They make for an entertaining read at the very least.