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THE GREAT, LONG HUMPBACK WHALE MIGRATION Humpbacks travel at a speed of 3-6 mph, but can cruise at up to 20 mph for short distances. But they don't all migrate at one time. In fact, some don't migrate at all - a phenomenon that still has researchers baffled. HUMPBACK BRAIN POWER Humpbacks may use the magnetite in their brains, in conjunction with the Earth's magnetic field, to navigate. Photo by Marty Wolff

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