@mtkprimehub: The world's largest waterfall is hiding UNDER the ocean. 🌊😳 Between Greenland and Iceland, cold dense seawater sinks and flows down a gigantic underwater slope. You can't see it from the surface… but it's one of Earth's most powerful hidden ocean systems. #scienceproject #Ocean #Earth #DeepOcean #OceanFacts #DidYouKnow #MTKPrime