Jellyfish and sea anemones enter true sleep-like states despite lacking brains or centralized nervous systems. Sleep appears to protect neurons by limiting or repairing DNA damage caused during ...

Turns out jellyfish and sea anemones – among the ancient creatures with a nervous system instead of a brain – have a very similar sleeping routine to our own. A new study published in Nature ...

Even a boneless, gelatinous sack lacking a dedicated anus and brain needs its beauty sleep, a new study by researchers from Bar-Ilan University in Israel finds. Jellyfish sleep a third of every day ...

What do humans have in common with jellyfish and sea anemones? You might be thinking, not a lot, but a new study published in Nature Communications shows they do sleep like us and that sleep has a big ...

Jellyfish sleep around eight hours a night, take short daytime naps, and compensate for lost rest,all without having a brain. These behaviors, revealed in a new study, suggest sleep may be far more ...

Sleep is one of life’s most universal behaviors. Despite its ubiquity, it’s also one of the most mysterious. Humans spend about a third of their lives with their eyes closed and their brains in states ...