Jellyfish Sleep and Nap Like Us and That Says Something Weird About Our Neurons

This article from ZME Science explores how jellyfish sleep, suggesting that sleep may be a mechanism to repair DNA rather than a function of the brain. Researchers found that jellyfish, which lack a central brain, still sleep and their DNA damage is repaired during this time. This challenges the previous assumption that sleep is for brain maintenance and suggests that sleep evolved as a maintenance mode to ensure genomic integrity.