Jellyfish seem to sleep for about 8 hours a day, take midday naps and snooze more after a bad night’s sleep – just like us. Sleep is thought to have first evolved in marine creatures like these, and ...

Sleep is one of life’s most universal behaviors. Despite its ubiquity, it’s also one of the most mysterious. Humans spend about a third of their lives with their eyes closed and their brains in states ...

A new study analyzed the sleep patterns of jellyfish and sea anemones and found they share some sleep traits with humans. The research could provide insight into the origins and function of sleep.

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 ...

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 ...