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Dec 3, 2015, 7:20 pm105 pts
MongabayMigratory birds are awe-inspiring. Every year, millions traverse across oceans and continents, many each racking up thousands of miles as they fly. The longest marathon migrant, the Arctic tern, covers more than 70,000 kilometers (about 44,000 miles) annually during its journey from the Arctic to the…
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