What causes monster waves?

 Statistically, a large ship is lost in the world’s oceans almost once every seven days. One reason for this: monster waves that appear to come from nowhere. Unlike tsunamis, they are completely unpredictable. That means there’s no way to issue any kind of warning.

Scientists still know astonishingly little about these freak waves. For centuries, many people dismissed them as the stuff of legend. The first scientific proof of their existence didn’t come until 1995. A laser on the Draupner oil rig in the North Sea measured a wave almost 26 meters high. Wave models in use at the time deemed this to be an impossibility. But the data, captured by chance, changed the course of research forever.