Science News Summary: Octopus research provides insights into how sleep evolves

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Octopus research provides insights into how sleep evolves

The octopus is an extraordinary creature – and not just because of its eight limbs, three hearts, blue blood, splash of ink, ability to stealth and the tragic fact that it dies after mating. A study by researchers in Brazil published on Thursday shows that this animal, already considered perhaps the smartest invertebrate, has two major alternating sleep states that are eerily similar to those in humans – and could even dream.

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(With contributions from agencies.)

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