Through the years, many people have speculated about whether events or something they are told is true .

These people think of other ways a certain event could have happened based on evidence, and their ideas are usually darker than what authorities tell them. After there’s enough evidence piled together, it is called a theory, specifically, a conspiracy theory.

A couple examples of conspiracy theories are the moon landing, the illuminati, JFK’s assassination, the Mandela Effect, the flat Earth theory and lastly, the bizarre Time Cube Theory.

Here are the examples explained in greater depth:

Moon Landings

For decades there has been a conspiracy of whether Neil Armstrong really did take the first step on the moon in 1969.

Desperate to beat the Russians in the race to the moon, conspiracy theorists say the government hired a film crew to create and shoot a setting that appears like the moon in order to have Armstrong and Buzz Aldrin act out what is known as the “moon landings.”

Skeptics say, depending on the theory, the set was either in the Hollywood Hills or Area 51. The photos and videos were only available through NASA, which means there is no other verification of the moon landings.

Another clue was the waving flag shown in the film, because on the moon there is no possible way of there being wind as it is essentially a vacuum.

“NASA says Aldrin was twisting the flagpole to get the moon soil,” reported TIME Magazine, “which caused the flag to move.”

Theorists have suggested the filmmaker and director of 1960s film 2001: A Space Odyssey proves that technology to create a fake moon landing existed.

Also it is believed that three astronauts who died in a fire while testing the equipment for the moon landing were executed by the U.S. Government to prevent them from telling the truth.

JFK Assassination

On Nov. 23, 1963, President John F. Kennedy was shot twice while riding in an open-topped limo through Dealey Plaza in Dallas, Texas.

Struck twice in the head and on the neck by Lee Harvey Oswald and was believed by officers to have acted alone.

A 2003 ABC News poll found that 70 percent of Americans believe Kennedy’s death was the result of a bigger scheme.

It is believed that the trajectory did not line up with Oswald’s perch on the sixth floor of the Texas School Book Depositor; others say there must have been a second shooter in Dealey Plaza. Other conspiracies claim this was an act of hate from CIA agents, or that Vice President Lyndon Johnson had ordered it to happen.

Others theories suggest involvement by KGB operatives were involved or that mobsters were mad at Kennedy’s brother for initiating the prosecution of organized crime ring.

The Illuminati

Originally, the illuminati was an 18th century enlightenment society. It was founded in Ingolstadt, Germany, on May 1, 1776, by Adam Weishaupt. The first theory about this society started at the beginning of the 19th century when a couple of conservatives in Europe speculated the illuminati started the French Revolution.

Now, the illuminati is described as an elite organization consisting of the world’s most profound leaders and celebrities.

Their supposed goal is to “secure the ongoing survival of the human species,” as their website says. Yes, they have their own website and it is actually a bit terrifying.

Theorists believe they are evil and control everything from the media to the government. Some famous figures who are believed to be either a part of this organization or brainwashed by them include Beyonce and her husband Jay-Z, the Kardashians, Queen Elizabeth II, David Rockefeller and the Bushes.

Mandela Effect

It all started with Nelson Mandela, hence the reason it is called the Mandela Effect. The former South African president died on Dec. 5, 2013, but many people were struck with

confusion; they remembered Mandela “dying” while imprisoned in the 1980s.

Since then, a Mandela Effect describes any event a large mass of people remember a different way. One popular example is The Berenstain Bears. There are several people who remember this book series being spelled Berenstein Bears – with an “e.” Conspiracy theorists suggest the reasoning behind the Mandela Effect is parallel universes.

Somehow we shifted into a different reality, and some people remember how something was in the prior reality. Another example is from Star Wars. A lot of the population remembers the very famous line said by Darth Vader, “Luke, I am your father.” However, if you watch the scene, he says, “No, I am your father.”

Area 51

Conspiracy theorists believe that remains of UFO spacecrafts have been stored in Area 51, which is an Air Force base in New Mexico, some 150 miles from Las Vegas.

It is believed scientists reverse-engineer the UFO. UFO sightings in the area and testimony from a retired Army colonel claim that he was given access to the aliens materials that had crashed in Roswell, N.M.

It is also believed that time travel has been the topic of study for the scientist in Area 51, where all information is classified for the purpose of national security, which makes it look even more suspicious.

It is believed to be used for examining dead aliens that came in UFOs and interrogation of living aliens, creating deadly exotic energy weapons, and experimenting with weather control.

“I just think that they are fun to read,they make me question,” said senior Taylor Johnson. “If I am on YouTube and I see a conspiracy video I’ll watch them, like Shane Dawson.”

Conspiracy theories have taken over many things, even Youtuber Dawson’s career, he is known for making videos on trending conspiracy theories.

Sources: Time Magazine; mandelaeffect.com; area51.com