8: Methane hydrates

Deep beneath the surface of the Bermuda Triangle lie pockets of trapped methane gas, just waiting to be unlocked by seismic activity or underwater landslides. If unleashed, the theory goes, this methane gas could bubble to the surface, reducing the density of the water.

Any ship in that patch of water would lose its buoyancy and sink perilously. It gets worse: In theory, if enough of the flammable gas bubbled up to the surface and got high, high, high up into the air, it could potentially stall an airplane engine or even be ignited by an engine's spark.

It's important to note that the Bermuda Triangle is far from the only place on the planet where methane hydrates exist - it's not even the area with the highest concentration - but it is possible that these hydrates could pose a threat.

Now, would their eruption be powerful and forceful enough to sink a ship or down a plane? We'll leave that one up to you.