Image: Migrating whales following magnetic lineations in the seafloor
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Figure 3: Migrating whales and other cetaceans appear able to follow magnetic lineations in the seafloor, which are aligned predominantly north-south. Other lineations oriented primarily east-west intersect these north-south lines; these east-west lines correspond to frature zones across the spreading ridges. The scale's colors and numbers denote how old the seafloor is in millions of years.
This image is part of the PBS Nova documentary Magnetic Storm
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