National Geographic Readers: Great Migrations Whales (USED)
Over the course of their 70-year lifespan, sperm whales will easily travel the circumference of the Earth in search of food and the need to breed and find a mate. Males will travel as far north as the Bering Sea and as far south as Antarctica in order to find enough food to sustain their ways of live—up to 700 squid a day! Along the way, these massive beasts battle 30-feet-long giant squids, and each other, to sustain their ways of life.
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