Science and technology

Associated Press
In this June 2013 photo released by the Cornell University Lab of Ornithology, a blackpoll warbler sits on a limb in New Hampshire. A study to be published Wednesday, April 1, 2015, in the journal Biology Letters found that the tiny songbird that summers in the forests of northern North America has been tracked on a 1,700-mile, over-the-ocean journey from the northeastern United States and eastern Canada to the islands of the Caribbean. (AP Photo/Cornell University Lab of Ornithology, Laura Erickson)

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