Whales have been on this planet for longer than humans have walked upright. Are they intelligent? Linguists contend that even the most intelligent non-human animals lack a communication system that could be called language. But could whales prove an exception? Biologists have studied whales for decades and quickly realized that they lead complex social lives. For example, sperm whales have the animal kingdom’s biggest brains, six times larger than ours. They live in female-dominated social netwo

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