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Swallows of the western skies

This article is reproduced by CienciaPR with permission from the original source.

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Jessica Arriens

Editor's Note: This article is reproduced by Ciencia PR with permission from the original source, the National Science Foundation.

Ushuaia and Fairbanks are cities near the tips of the world. 

The capital of Argentina’s Tierra del Fuego province and the Alaskan metropolis don’t share much in common. Except for a cluster of simple wood boxes on poles, and the scientists and swallows who flock to them. 

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