Blue Whales’ Migrations Depend on Their Memories

Imagine trying to test the memory of the blue whale—the biggest animal that exists or has ever existed, a 190-ton behemoth that dwarfs even the largest dinosaur, a leviathan that is rarely seen except when it comes up for air and a minute part of its 110-foot-long body breaks the surface and slowly crests for what seems like an eternity. How would you subject such a creature to a psychological test?

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