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Fish forgo sleep thanks to a molecule in the brain

Comparison of Astyanax mexicanus surface fish and Pachón cavefish

Mexican cavefish (right) lack eyes and sleep little, whereas their relatives (left) that live on the surface have eyes and sleep a lot. Credit: J. B. Jaggard et al./eLife/CC BY 4.0

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Nature 554, 406-407 (2018)




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