Malaysia Airlines flight MH370 went missing on March 8, 2014 while flying from Kuala Lumpur to Beijing.
The search for MH370 took place over an area of 120,000 square kilometers in the Indian Ocean but the plane's wreckage has yet to be found.
Aviation experts have put forward many theories about the MH370 case, including that the Boeing 777 flew for several hours before running out of fuel and crashing into the southern Indian Ocean.
Recently, some researchers have said that the wreckage of the plane that went missing 10 years ago may be in a deep trench in the Indian Ocean.
In addition to the missing MH370 , there are countless similar mysteries in history, according to Economic Times.
EgyptAir Flight 804
On May 19, 2016, EgyptAir Flight 804 carrying 66 passengers from Paris to Cairo crashed into the Mediterranean Sea. The digital flight data and cockpit voice recorder have been recovered, but the mystery remains.
Initial speculation focused on terrorism, but the French Civil Aviation Authority later concluded that a fire in the cockpit had caused the crash. Smoke was detected shortly before the plane disappeared from radar and the plane made an erratic turn, signs that the plane had descended to release the smoke.
Flying Tiger Line Flight 739
On March 16, 1962, Flying Tiger Line Flight 739 carrying 93 American commandos on a secret mission disappeared over the Pacific Ocean. After refueling in Guam, the plane failed to make its next stop at Clark Air Base in the Philippines. The weather was perfect and no distress signal was issued.
The search for the missing plane covered nearly 400,000 square kilometres but found no clues. A nearby tanker reported seeing an explosion in the air, leading officials to suspect sabotage, but no conclusive evidence was found.
Pan Am Flight 7
Another unsolved mystery is Pan Am Flight 7, which disappeared on November 9, 1957, while flying between San Francisco and Honolulu. Debris and 19 bodies were found days later, many wearing life jackets, suggesting the plane had time to prepare before the crash. High levels of carbon monoxide in some of the bodies suggested foul play, but no evidence of foul play was ever found.
Canadian Pacific Airlines Flight 1951
On July 21, 1951, a Canadian Pacific Airlines flight to Tokyo disappeared in Alaskan airspace. The plane was carrying 31 passengers and 6 crew members. The plane encountered bad weather but reported being able to continue flying. Despite months of searching, no wreckage of the plane was found.
Orient Airlines Flight 2501
Similarly, Northwest Orient Airlines Flight 2501 disappeared over Lake Michigan on June 23, 1950, during a storm. Although an oil slick and some debris were found, the plane was never recovered.
2 flights by British South American Airways
The Bermuda Triangle has become part of the world's aviation mysteries, including the disappearance of two British South American Airways planes: the Star Ariel in 1949 and the Star Tiger in 1948. Both planes disappeared without a trace despite favorable weather conditions and normal radio communications. To this day, these missing planes remain unsolved.
