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Groups of walruses are vulnerable to disturbances, but it's hard to avoid them if you don't k**w where they are. A new tool from U.S. and Russian researchers draws on history to protect the animals.
أكثر... ??????? ??????: What Does It Take To Map A Walrus Hangout? 160 Years And A Lot Of Help || ??????: ahlam1399 || ??????: اسم منتداك
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