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9 of the smartest animals on Earth

dolphin underwater

Photo: ZUMA Press

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Dolphins

Dolphins are well-documented as intelligent animals. As Discovery News reports, the dolphin’s large brain is structured for awareness and emotion. In fact, dolphin brains are more structurally complex than humans. As Emory University dolphin expert Lori Marino told Discovery News, “If human standards for intelligence are applied to non-human animals, however, dolphins come very close to our own brain aptitude levels.”