00:00At the southern tip of South America, the Atlantic and Pacific Oceans collide, but don't mix.
00:05You can actually see the line between them.
00:08One side dark blue, the other lighter.
00:11Why?
00:12It's not a force field, it's science.
00:14These oceans have different salinity, temperature, and density.
00:17That creates a boundary, like oil and water, where the currents push against each other.
00:21It's called an oceanic halocline, and it can stretch for miles.
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