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The cephalopods experience an apparent sleep state with REM-like activity.

MDMA and psilocybin can now be prescribed by approved psychiatrists in Australia. Plus, US Supreme Court ends affirmative action at universities and what we need to know about the El Niño weather event. MDMA and psilocybin can now be prescribed by approved psychiatrists in Australia. Plus, US Supreme Court ends affirmative action at universities and what we need to know about the El Niño weather event.

To test this hypothesis, the biologists verified whether the octopuses were really asleep in the active sleep stage by subjecting them to various external stimuli.

Just like humans, sleeping octopuses alternate between active and quiet sleep stages.

Like humans, octopuses transition between two sleep stages, a quiet stage and an active stage that resembles REM sleep in mammals.

Scientists have speculated about the cognitive and dreaming abilities of the octopus. This study is a step closer in understanding their complex behavior. As does a study on cuttlefish from the same team, showing their color shifting like never before.

Theyve long been known for their surprising intellect, akin to that of a dog, but now new evidence sugges...

Researchers at Okinawa Institute of Science and Technology say the skin patterns octopuses create while they are snoozing may indicate they are capable of something similar to dreaming.

Study looks at electrical signals octopuses produce in their brain while asleep and awake.