Sleep is such a basic need that even ancient brain-less jellyfish and sea anemones do it, study finds

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

The Deep Evolutionary Roots of Sleep

Scientists already knew that the pair of shallow coastal ocean dwellers keep very different schedules of downtime: The ...
Nature

Jellyfish sleep like humans — even though they don’t have brains

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

Cracking sleep's evolutionary code: Neuron protection traced back to jellyfish and sea anemones

A new study from Bar-Ilan University shows that one of sleep's core functions originated hundreds of millions of years ago in ...
Hosted on MSN

7 creatures that can sleep with their eyes open

Most animals close their eyes when they sleep. But did you know some amazing creatures can actually sleep with their eyes open? It might seem strange, but these animals have developed abilities to ...