The benefits of sleep may be more universal than we thought. We know it helps clear waste from the brain in humans, and now ...

Jellyfish and sea anemones are curious creatures: these organisms evolved without a brain and, as scientists discovered only ...

Sleep may have evolved to help reduce DNA damage in nerve cells long before they became centralized in the brain, a study ...

Despite not having a brain, jellyfish sleep for around eight hours a day, just like humans according to a new study.

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

With increased DNA damage from UV radiation or other reasons, the researchers also observed the jellyfish and sea anemones ...

Jellyfish and sea anemones display human-like sleep, supporting theories about sleep’s role in preserving neurons, even ...

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

Yet, jellyfish tend to sleep through the night like humans, and even nap around midday. Meanwhile, their close relative, the ...

Jellyfish and sea anemones exhibit sleep-like states without brains. Scientists say this discovery rewrites evolution’s timeline, showing sleep may predate complex nervous systems entirely.

In jellyfish and sea anemones, neurons accumulate DNA damage while animals are awake and repair that damage during sleep.

Studying ancient sea creatures’ snoozing habits could shed light on the origins of sleep.