Jellyfish and sea anemones sleep too. A new study reveals that sleep may have evolved to protect nerve cells from DNA damage.

Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...

Jellyfish sleep around eight hours a night, take short daytime naps, and compensate for lost rest,all without having a brain.

It turns out sleeping isn’t just about resting your eyes, as a new study found that even ancient creatures without eyes — or ...

Every animal with a brain needs sleep — and even a few without a brain do, too. Humans sleep, birds sleep, whales sleep and even jellyfish sleep. Sleep is universal “even though it’s actually very ...

Learn how jellyfish and sea anemones are changing what we know about the evolutionary purpose of sleep.

Bar-Ilan University research shows even jellyfish and sea anemones repair DNA during repose, underscoring the fact that a ...

A groundbreaking new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions ...