The remains of long-missing flight Malaysia Airlines 370 may have been found Wednesday, after investigators unearthed at least one decaying part of a Boeing 777 off the coast of the island of Reunion, near Madagascar. 

A section of a Boeing's wing floated onto the La Reunion beach earlier Wednesday, prompting immediate rumors about its possible link to the downed plane. 

The number BB670 was found on the section, which is believed to be part of the flap - one of the movable parts which controls airflow. 

Xavier Tytelman, an expert in aviation security, told the Daily Mail that while the number is not a serial number, it does mean that the part can be tracked - and a definitive answer will be available within days. 

"We continue to share our technical expertise and analysis," Boeing stated Wednesday night. "Our goal, along with the entire global aviation industry, continues to be not only to find the airplane, but also to determine what happened - and why." 

Still missing

Flight 370 disappeared on March 8, 2014, along with 239 passengers and crew. 

A range of theories as to that flight's fate have emerged – from hijacking to crashing to being diverted for use in a terror attack, possibly against Israel. Later theories have become even wilder, ranging from an onboard fire to a suicide mission

Controversy reigns over every detail of the flight, including the co-pilot's last words - "All right, good night" - and the fact that two Iranian nationals with stolen passports were on board.

One highly publicized theory last year predicted that the 239 passengers and crew died from hypoxia, or oxygen deprivation, building on earlier analysis pointing to fuel starvation. A Helios Airways flight in 2005 crashed under similar circumstances. 

A more recent theory suggests that the pilot deliberately flew the plane into the sea at a perfect 90-degree angle - thus lessening the debris field. 

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