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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .On a visit to the Tampa area way back when, I enjoyed a stinging reminder that not all little red ants are benign.
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3 .Introduced fire ants in the U.S.South are just one example of how ants from one region can set up colonies in another.
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4 .South American so-called "crazy" ants now damage electrical equipment in the U.S.
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5 .And super-colonies of Argentine ants are all over Europe.
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6 .To gauge such expansions, scientists, including Scientific American contributor Rob Dunn, tried to track introduced ant species in the Netherlands, New Zealand and the U.S.
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7 .They found that some 252 ant species have infiltrated the three places,
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8 .mostly accidentally, for example, in shipping containers full of fruit or wood.
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9 .The researchers think their official count is low,
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10 .they estimate the true number at nearly a thousand species.
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11 .And most can make a permanent home on new shores, thanks to coming from nearby, climatically similar regions.
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12 .The research appeared in the journal Biology Letters.
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13 .Expanding their empires may be good news for ants.
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14 .But maybe not for humans, as I learned all too painfully.
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15 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.
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