Researchers have found that octopuses have quiet and active stages of sleep and the active stage closely resembles REM sleep that mammals experience. This includes twitching, increased breathing and flashes of skin color.
It was once thought that only vertebrates cycled between the two stages of sleep. Scientists are amazed that a similar sleep cycle evolved separately in octopuses.
Sleeping and dreaming may be one of the most fundamental needs for life.
Learn more at https://www.goodnewsnetwork.org/octopuses-have-remarkably-similar-sleep-patterns-to-humans-and-may-even-dream/