One year on, MH370 theories abound

Local workers transport a piece of the Malaysia Airlines flight MH17 wreckage at the site of the plane crash near the village of Hrabove (Grabovo) in Donetsk region, eastern Ukraine November 20, 2014.[Photo/Agencies]

MH370 and MH17 were same plane 

This theory is based on photos of the MH17 crash site in Ukraine, which proponents argue shows that the second crashed plane was in fact MH370, a later 777 model that had some small changes to its body. How MH370 could have been hidden for six months before being substituted for MH17 - and what happened to the bodies - is not explained.

It was abducted by aliens 

Self explanatory.