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 4:08 PM EST

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.

Megan Lim

Jeanette Woods

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

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