The jellyfish, like the sea anemone, although lacking a brain, experience deep rest phases that meet all the criteria of sleep. This discovery provides valuable insights into this state that occupies ...

NASHVILLE, Tenn. (WSMV) - It turns out sleeping isn’t just about resting your eyes, as a new study found that even ancient creatures without eyes — or even brains — need it too. A study published in ...

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 ...

Sleep, it turns out, is not a luxury reserved for animals with big brains and busy calendars. New research shows that jellyfish drift into a nightly slumber that lasts about as long as a human’s, ...

An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its translucent bell. By night that beat drops from roughly 36 pulses a minute to nearer 30, and the animal slips into a ...

A new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in jellyfish and sea anemones, among the earliest creatures with nervous ...

They have no brains, no spine, no heart. And they’re not politicians. They are jellyfish. And they’ve been around for over 500 million years. These mysterious sea animals have finally gotten their ...