Mystery #2Tier 3ocean currents
Why does the ocean flow in enormous rivers-within-the-sea called currents?
Out in the open ocean, water is on the move. Whole belts of it flow like rivers, wandering thousands of miles, carrying warmth and cold from one side of the planet to the other. Nothing has walls to hold these rivers in. So why does the ocean flow in enormous rivers-within-the-sea called currents?
Your guess
What do you think keeps all that water flowing instead of sitting still?
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