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Jellyfish sleep a lot like us—and for the same reasons

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thumb_up 48 2026 3 months ago
You don’t need a brain to benefit from a good night of sleep. Despite lacking a central nervous system, jellyfish and sea anemones have sleep patterns remarkably similar to those of humans, researchers report in Nature Communications. As upside-down jellyfish pulse, their umbrellalike bells expand and contract. When the jellyfish nod off, their bells pulse less frequently. The work supports the idea that sleep arose early in animal evolution to help the first neurons repair themselves. Learn more: https://scim.ag/4eqWVFu FOOTAGE CREDIT: AMIR HARDUF AND RAPHAËL AGUILLON #Jellyfish #Science #ScienceShorts