Brainless jellyfish could reveal why we sleep - The Washington Post

https://www.washingtonpost.com/news/speaking-of-science/wp/2017/09/21/scientists-just-discovered-the-first-animal-without-a-brain-that-sleeps/

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First saved: 2017-Sep-22 (Fri)
Last checked: 2017-Sep-22 (Fri), response 200