What if you are travelling in a flight and your plane suddenly disappears and never comes back? The Bermuda Triangle, also known as the Devil's Triangle, is an urban legend focused on a loosely-defined region in the western part of the North Atlantic Ocean where a number of aircraft and ships are said to have disappeared under mysterious circumstances. The idea of the area as uniquely prone to disappearances arose in the mid-20th century, but most reputable sources dismiss the idea that there is any mystery. There are some assumptions though. Those assumptions are that in the area frequented by tropical cyclones, the number of disappearances that did occur was, for the most part, neither disproportionate, unlikely, nor mysterious. Hurricanes are powerful storms that form in tropical waters and have historically cost thousands of lives and caused billions of dollars in damage. An explanation for some of the disappearances has focused on the presence of large fields of methane hydrates on the continental shelves. It has been hypothesized that periodic methane eruptions may produce regions of frothy water that are no longer capable of providing adequate buoyancy for ships. If this were the case, such an area forming around a ship could cause it to sink very rapidly and without warning. And there is a case of Flight 19 which was a training flight of five TBM Avenger torpedo bombers that disappeared on December 5, 1945, while over the Atlantic.