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1 .This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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2 .At some point, we all had to memorize the names of Earth's oceans.
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3 .But in reality all this water is connected.
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4 .So how do we know where one body begins and another ends?
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5 .Just follow the trash, because the location of seafaring garbage can be used to define the oceans' borders.
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6 .That's according to a study in the journal Chaos.
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7 .Historically speaking, the planet's waters have been partitioned into discrete oceans for reasons that are geographical, historical, even cultural.
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8 .To approach the problem from a more anatomical perspective, researchers came up with a model of how surface waters move.
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9 .Which is where the rubbish comes in.
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10 .Flotillas of flotsam are formed by currents that gather the garbage in large floating patches.
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11 .But the currents also create barriers that minimize mixing between different ocean regions.
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12 .By modeling these currents, researchers have redefined the borders of the ocean basins based on how readily their waters mix.
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13 .They find, for example, that a sliver of the Indian Ocean is really part of the south Pacific.
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14 .The work should help track ocean debris or even the spread of spilled oil.
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15 .And it could change the way we see our seas.
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16 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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