Even a boneless, gelatinous sack lacking a dedicated anus and brain needs its beauty sleep, a new study by researchers from Bar-Ilan University in Israel finds. Jellyfish sleep a third of every day ...
These rare sea creatures live where the sun don't shine. By Laura Baisas Published Jan 6, 2026 4:15 PM EST Get the Popular Science daily newsletterđź’ˇ Breakthroughs ...
Living in the crushing dark of the deep ocean, the seldom-spotted leviathan can measure well over 33 feet long. Reporter Scientists have captured rare video footage of a giant phantom jellyfish ...
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 ...
Neither jellyfish nor sea anemones have brains. But these animals sleep in ways strikingly similar to humans, according to a study published today in Nature Communications 1. The findings bolster a ...
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