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Health & Science3h 51m ago

The tallest waterfall on Earth sits unseen on the seafloor between Iceland and Greenland, with no spray and no audible roar.

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Denmark Strait between Iceland and Greenland

Who
oceanographers, Mike Clare, Anna Sanchez Vidal
What
The tallest waterfall on Earth sits unseen on the seafloor between Iceland and Greenland, with no spray and no audible roar.
When
Fri, 12 Jun 2026 23:00:54 GMT · 3h 51m ago
Where
Denmark Strait between Iceland and Greenland ·
Why
Cold water from the Nordic Seas meets warmer water from the Irminger Sea, and because the cold mass is denser, it slides underneath and spills down the sloping seabed.
The Frontline Impact

How this affects you

This underwater phenomenon, known as the Denmark Strait cataract, plays a significant role in shaping the circulation of the entire Atlantic Ocean.

Story chain

3 events in this thread
  1. Health & Science3h 51m ago
    The Denmark Strait cataract, Earth's tallest waterfall, sits unseen on the seafloor between Iceland and Greenland, where dense cold water plunges about 3,500 meters down a slope.
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  2. Health & Science3h 51m ago
    The Denmark Strait cataract drops about 11,500 feet, down a slope on the ocean floor.
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  3. Currently Reading3h 51m ago
    The tallest waterfall on Earth sits unseen on the seafloor between Iceland and Greenland, with no spray and no audible roar.

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