Gray whale travels 13,987 miles, breaking world record

April 15, 2015 6:15 PM

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A Western North Pacific gray whale traveled nearly 14,000 miles from Russia to Mexico and back again, breaking the known world record for mammal migration, researchers say.

The 13,987 mile journey took 172 days and was tracked in a study published in the journal Biology Letters.Previously the world record for mammal migration belonged to the humpback whale, which migrates up to 10,190 miles, according to Guinness World Records.

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