"Sleeping Similarities: Octopuses and Humans Share Dreaming Patterns"

Octopuses, the first known invertebrates to exhibit REM sleep, have been found to experience both periods of quiet sleep (NREM sleep) and bursts of neural activity similar to the waking state during REM sleep. Researchers observed the animals' eyes and tentacles twitching while their skin changed color, suggesting that octopuses may be capable of dreaming. The study also revealed similarities between the neural activity of octopuses and humans, further highlighting the complex cognitive abilities of these cephalopods. Further research is needed to determine if the color changes during REM sleep are indeed indicative of dreams.