What are UFOs, and where do they come from? Are they extraterrestrial spacecraft visiting Earth from another star system in our galaxy, or are they from our own solar system? First, let us assume that UFOs originate from other stars in our own galaxy. The nearest star to our planet, other than the sun, is Alpha Centauri, which is approximately four light years away. At this distance, a spacecraft from that star system would take 4 years to reach Earth, at least. However, the occupants of the craft may experience a somewhat shorter trip. Even so, travelling near the speed of light does not seem to be a very efficient way of exploring a galaxy that is over 100,000 light years in diameter. Could it be that alien technology has carried them beyond normal modes of space travel? Are they capable of near-instantaneous travel from one part of the galaxy to another? Looking at UFO reports over the past 60 years, there are many instances of craft that seemingly blink in and out of existence. Maybe this is evidence of a super-technology that we can only imagine at this point in our evolution. To get a better understanding of how extraterrestrial spacecraft might achieve this technology, it is necessary to delve into something called quantum theory. The idea of quantum connection suggests that once two quantum systems have interacted, they are permanently linked, no matter what the distance is between them. Because of this link, communication is possible between the two systems. Through a process called quantum tunnelling, a particle in system A can instantaneously travel to system B, even though the two systems may be separated by great distances. Could it be that the extraterrestrials have incorporated their understanding of this into space travel? Scientists have long theorized on the possible existence of multiple universes, all of them together making up a set of all possible outcomes of all possible events. For example, if our universe had been formed in a slightly different manner, then life as we know it would not be possible. Perhaps there is a separate universe and at the time of the Big Bang, each of these universes contained life totally foreign to us. It takes a significant stretch of the imagination to grasp these concepts, but perhaps some UFO occupants have succeeded in using a form of quantum tunnelling to travel between universes. To an observer, this technology might manifest itself in the sudden appearances and disappearances of UFOs, and the so-called blinking effect. Of course, we can only describe UFOs and explain their technology in terms of our own knowledge so far. The reality of the UFO phenomenon might be far beyond anything imaginable.