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Seas and Oceans: Modern Science has discovered that in the places where two different seas meet, there is a barrier between them. This barrier divides the two seas so that each sea has its own temperature, salinity, and density (1) [Principles of Oceanography, Davis, pp. 92-93]

“He has set free the two seas meeting together. There is a barrier between them. They do not transgress.” [55:19-20].