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Chimpanzees, our closest living relatives, are known for their exceptional intelligence. These clever primates have been observed using tools, such as sticks to fish for termites or rocks to crack open nuts.
Dolphins are the brainiacs of the ocean, with a brain-to-body-size ratio second only to humans. These marine mammals are known for their playful nature and impressive communication skills, using a variety of clicks, whistles, and body language to convey information to their pod mates.
Elephants are not only the largest land mammals but also among the most intelligent. These gentle giants have exceptional memories, able to remember the locations of water sources and the faces of individual humans and other elephants for years.
Crows and ravens are among the smartest birds on the planet. These clever corvids have problem-solving skills that rival those of primates. They can use tools, such as bending wire to create hooks for retrieving food, and even solve multi-step puzzles.