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The Boas is a river on Southampton Island in Nunavut, Canada. The river rises at 64°49′58″N 084°23′34″W / 64.83278°N 84.39278°W and its mouth is located at the Bay of Gods Mercy. Proceeding inland, the river becomes braided and is about 5 kilometres (3.1 mi) wide. It is named after anthropologist Franz Boas.