One of the controversies that has been around the UFO phenomenon is what UFOs are. For some, they are experimental aircraft being tested by the government. For others, they are alien spaceships from outer space, here on their mysterious missions.
Another idea is that they are interdimensional operators moving across a bridge between realities from some parallel dimension. However, these are not all theories, and more and more attention is being paid to the fact that aliens may not be those described above, but rather people from the future.
One idea that has been put forward regarding the origin of UFOs and alien encounters is that they are not aliens from another planet or dimension at all, but rather us. The idea basically boils down to the fact that these creatures are people from the future.
To read more, click here.