It has been more than a month since Malaysia Airlines flight 370 went missing, and there have been various conspiracy theories touted surrounding how the flight disappeared and even some shockingly claim that the plane location is known and has been found.

However, for all the conspiracy theories and official denials, the fact remains that since the Malaysian Airlines Boeing 777 went missing on March 8 nobody knows for sure where the plane and its 239 passengers went and what happened. 

Just recently, a US Navy robotic submarine named Bluefin 21 searched the rumored crash site off the coast of Australia because of oil slick near the area. As a result, it was determined that the oil slick found in the Indian Ocean was not related to missing plane.  

Here are some conspiracy theories regarding what some people believe happened to the missing plane last month.

One conspiracy theory claimed that the plane secretly landed in the secluded island of Diego Garcia. However, that theory has been absolutely denied by officials.

"There was no indication that MH370 flew anywhere near the Maldives or Diego Garcia... MH370 did not land in Diego Garcia," wrote a US embassy spokesperson via email to Malaysia's Star newspaper. "Under the coordinating efforts of Malaysia and Australia, the US Navy's Seventh Fleet is working alongside 26 other nations to locate the aircraft based on areas identified by Malaysian and international experts."

Others have even gone as far as saying they believe that aliens actually took the plane and the 239 missing passengers - reports even appeared on CNN with analysts discussing the theory.

Some people used social media to express their views.

"This malaysian airline flight has the potential to be either the greatest heist since DB Cooper, or alien abduction. I vote aliens," wrote Cameron Bush via Twitter on March 10.

Others believe terrorism might have been the reason for the missing plane. However, as of right now, no terrorist groups have announced any involvement in the plane's disappearance, and there has been no hard evidence to confirm such suspicions.

Some people also believe that pilot Zaharie Ahmad Shah or co-pilot Fariq Abdul Hamid might have intentionally crashed the plane. However, again there is no evidence to clearly suggest this happened.

"There have been absolutely no implications that we are aware of that there was anything untoward in either his behaviour or attitude," said Malaysia Airlines Commercial Director Hugh Dunleavy to Reuters in an interview. "We have no reason to believe that there was anything, any actions, internally by the crew that caused the disappearance of this aircraft."