Bubbles can sink floating objects, which suggests that methane bubbles escaping from methane reserves in the seabed might may be the cause for so many vessels disappearing in the Bermuda Triangle.

In order for an object to float, the density of the liquid has to be greater than the density of the object. If you mix enough bubbles into a liquid to lower its average density, an object floating on its surface will sink. This may be why so many ships sank in that area for no obvious reason.
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