Was it a fire? A pilot suicide? Did the jetliner fly in the shadow of another plane?
In the nearly two weeks since its disappearance, several have attempted to theorize what may have happened to Malaysia Airlines Flight 370.
On March 8, the Boeing 777 passenger jet dropped from civilian radar sometime after leaving from Kuala Lumpur, Malaysia, en route to Beijing, China. It had 239 people on board including 227 passengers and 12 crew members.
BELOW: See timeline of events as they've unfolded thus far.
Malaysian military radar last detected Flight 370 in the northern mouth of the Strait of Malacca, south of Phuket Island, Thailand, and west of the Malaysian peninsula -- hundreds of miles off the planned course of flight.
It was estimated the plane had enough fuel to fly up to 8 hours after losing contact.
On March 15, authorities said it veered sharply off its flight plan because of "deliberate action by someone on the plane."
Since the disappearance, 26 countries have united to search a vast area of nearly 3 million square miles, ranging from the South Indian Sea to deep into the Asian continent.
Investigators currently believe the area being searched to the south, over the Indian Ocean, is the most likely location of the plane.
Military and intelligence officials have indicated that while no one knows what happened to the plane, it is most logical to conclude that it crashed into the Indian Ocean.
In the latest announcement, authorities said a flight simulator in the pilot’s home revealed he deleted files containing records of simulations.
As the investigation continues and more theories are considered, everyone from aviation experts and those familiar with the investigation to celebrities and tabloids are weighing in on what may have happened to Flight 370.
Some of the theories:
Pilot Chris Goodfellow believes an electrical fire caused the pilot to seek the nearest, safest runway, and the pilot redirected to head to the Palau Langkawi airstrip.
Hobby aviation enthusiast Keith Ledgerwood suggests the plane may have “shadowed” another plane to appear undetected by radar.
Either the pilot or copilot committed suicide by crashing the plane.
The plane was hijacked by terrorists.
Musician Courtney Love, using Tomnod, an online satellite imagery map, thinks she may have found the missing plane.
British tabloid The Sunday Sport claimed the plane was found on the moon, and included an image on their cover.
Information obtained from WCPO, CNN, The Associated Press and NBC is included in this piece.