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Jellyfish sleep and nap like us. Studying them could help human brains

By Megan Lim,
Jeanette Woods, Mary Louise Kelly
Published January 13, 2026 at 2:08 PM MST

A new study analyzed the sleep patterns of jellyfish and sea anemones and found they share some sleep traits with humans. The research could provide insight into the origins and function of sleep.

Copyright 2026 NPR
Megan Lim
[Copyright 2024 NPR]
Jeanette Woods
[Copyright 2024 NPR]
Mary Louise Kelly
Mary Louise Kelly is a co-host of All Things Considered, NPR's award-winning afternoon newsmagazine.
See stories by Mary Louise Kelly