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    World's longest mammal migration

    Al Jazeera English

    by Al Jazeera English

    Al Jazeera reports on the longest migration made by any mammal on earth.

    The Gray Whale itself is a phenomenal sight.

    These animals spend their entire lives within a few kilometers of the shoreline.

    Yet their 18,500 km annual migration take them from the Bering Sea between Russia and Alaska all the way down the coast to Mexico's western coast.

    Franc Contreras takes us to the world's oldest whale sanctuary in the Baja California peninsula.