Add Yahoo as a preferred source to see more of our stories on Google. Jellyfish and sea anemones are curious creatures: these organisms evolved without a brain and, as scientists discovered only in ...

Researchers report sleep-like states in brainless marine animals, suggesting rest began as a basic cellular repair mechanism.

An upside-down jellyfish drifts gently in a shallow lagoon. At first glance, it looks like it’s just floating, but scientists have discovered something qui ...

Add Yahoo as a preferred source to see more of our stories on Google. THE NATURAL HABITAT of Cassiopea andromeda in the Gulf of Aqaba, Eilat. (photo credit: Meron Segev) A new study from the ...

Humans aren’t the only creatures that need to snooze. A peer-reviewed study by Bar-Ilan University researchers shows that sleep is an ancient process, dating back through evolutionary history, and an ...

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 ...

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 ...

An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its translucent bell. By night that beat drops ...