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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Londoners love their fish.
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3 .And according to a new study, in the early 13th Century they suddenly started importing it from as far away as the Arctic near Norway.
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4 .The research is in the journal Antiquity.
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5 .About the year 1000, sea fishing increased significantly in northern Europe.
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6 .To see how that increase influenced urban growth, researchers looked at 95 excavation sites in London.
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7 .Which included about 3000 bones from cod fish.
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8 .Cod are decapitated before being dried for transport.
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9 .So finding heads meant the fish were local.
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10 .And the researchers found that as fish heads appear to decrease in the early 1200s, fish tails dramatically increased, a sign of importation.
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11 .Examination of the chemical isotopes in the tails matched those for fish in waters far to the north, probably off Norway close to the Arctic, more evidence of import.
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12 .The scientists do not know if the rapid switch from local to imported cod happened because local fish weren't as plentiful as the population increased,
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13 .or if the market became flooded with dried imports from the north.
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14 .But these fish tails tell a story of London becoming a growing economic center, and part of a globalizing fish trade.
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15 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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