Octopuses are smart animals that can use tools, recognize individual people, and even solve puzzles. But perhaps the most mesmerizing example of octopus intelligence occurs when they are sleeping—and, potentially, dreaming.
This week, PBS released new footage of an octopus named Heidi shifting through flashy camouflage displays in her sleep. Much like human behaviors such as sleep-talking or sleep-walking, Heidi’s multi-hued transformations may be an expression of her dreams.
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