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For the first time, scientists have identified tropical and subtropical species of marine protozoa living in the Arctic Ocean. Apparently, they traveled thousands of miles on Atlantic currents and ended up above Norway with an unusual -- but naturally cyclic -- pulse of warm water. Such pulses are predicted to grow as global climate change causes shifts in long-distance currents. Colleagues wonder if the exotic creatures offer a preview of climate-induced changes already overtaking the oceans. [Source: ScienceDaily]
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