12. The Largest Waterfall on Earth
The Denmark Strait Cataract sits between Greenland and Iceland. It is an underwater waterfall that utterly dwarfs every waterfall on the surface.
The way it work is as follows. Cold water is denser than hot water, so it sinks. When cold-water basins pour into slightly warmer ones, the cold water goes down. All the way down.
At the Denmark Strait Cataract, Arctic water hits the warmer Irminger Sea, where it sinks almost 11,500 feet, three times the height of Angel Falls, the tallest waterfall on the surface, and it carries an estimated 175 million cubic feet of water per second, or 2000 Niagara Falls at their peak flow.
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