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Earlier this year, Weekend came across a story about the loneliest whale in the world...for three decades, he has crooned his way around the Pacific, his songs and apparent emotions drifting into the depths, unheard and unrequited. Known to scientists simply as "52", he's been swimming in solitude and emitting his calls at a frequency of 52 Hertz - a pitch no other whale can understand. Josh Zeman is an American film-maker and is joining up with a team of scientists to make a documentary about the animal. Weekend's Paul Henley spoke to Josh back in February and - with the help of the Beatles - asked him, first, how we knew 52 WAS a whale and - indeed was a "he". (Photo: A whale flips its tail. Credit: JUAN MABROMATA/AFP/Getty Images)