The topic of aliens and UFOs have been of much interest in the public domain for decades now and still, we do not officially know if there are any alien beings that are in contact or have been in contact with our race.

The answer to the question, “Are we alone in the universe?” is pretty much met with the same reply these days, which is, “Probably not, since the universe is just too big for us to be alone.” And the scientific community has been searching vehemently for at least some sign of life.

Having said that, there are millions of people in the world that believe that alien beings have already visited us and do so quite often, citing the thousands of UFO sightings. Different people have different theories as to how and where they come from.

Some theories sound too crazy, some sound far-fetched and there are some theories that are plausible. In any case, these alien conspiracy theories are really interesting to read about on a dull, boring day. Let me talk about four of these theories.

1. Time Traveling Aliens

There are many alien enthusiasts that say that alien beings are actually visitors from the future who have mastered time travel and our now visiting our planet in their time machines i.e. UFOs.

Some of the people believe that these alien beings are our own successors thousands or even hundreds of thousands of years into the future and they are visiting us just to observe how we progressed through our evolutionary stages. If we had time traveling capabilities, I think we would have gone back to observe our own evolutionary progress as well.

Then there are other people who say that they are simply beings from the future and they have nothing to do with us, evolutionary speaking. They say that these alien beings might even be inter-dimensional beings instead of belonging to our universe.

2. Computer Simulation Theory

This is another theory that is commonly discussed and I have talked about it quite a times too. Basically, what this theory suggests is that our universe is nothing but a simulation inside of a computer of highly advanced beings.

If you want to visualize it, imagine a computer game where you can play as any character you want. The characters would have no idea that they are in a game. In our case, we have consciousness and are able to ask these questions and we think that we have free will too.

Elon Musk is one of the proponents of this theory, though scientists say that it might be impossible to prove this unless the programmers of our world try to interact with us in any form or manner. If this theory is true, we might be just computer code!

3. Roswell UFO Crash

You cannot talk about alien beings and not mention Roswell. It has become synonymous with the phenomena itself. Alien theorists say that in July of 1947, an alien craft crashed near Roswell, New Mexico and there were even dead alien beings recovered from the crash.

The incident is also said to have led to the creation of the infamous Area 51, where the alien enthusiasts say that the alien bodies were taken and studied. Also, this is said to be the site where they reversed engineered the alien crafts. People claim to see strange lights over this area all the time.

While authorities claim that the whole incident is just nonsense and the crash was just a weather balloon, alien enthusiasts believe the whole thing to be a big cover up for obvious reasons.

4. Lunar Alien Base Theory

We went to the moon for the first time in 1969 in what was surely a giant leap for mankind and since then a ton of theories have sprung up claiming that the moon is an alien base and that they have been observing us all this time.

Conspiracy theorists even claim that Neil Armstrong and crew were confronted by the alien beings there when they landed and were told to “never come back”. They also say that’s the reason why we stopped going to the moon after the Apollo 17 mission in 1972.

Theorists believe that the far side of the moon (the one that is always faced away from the Earth) is home to numerous alien bases and cities and that aliens even live inside of the craters as well. As to the purpose of the aliens there, anything from mining resources, research and observation of our species have been suggested.