Watch an octopus have a nightmare!

Octopuses may have nightmares. That, at least, is one possible explanation for some extraordinary behaviour caught by cameras monitoring an octopus in a laboratory aquarium at the Rockefeller University in New York. Learn more ➤ Subscribe ➤ Get more from New Scientist: Official website: Facebook: Twitter: Instagram: LinkedIn: About New Scientist: New Scientist was founded in 1956 for “all those interested in scientific discovery and its social consequences”. Today our website, videos, newsletters, app, podcast and print magazine cover the world’s most important, exciting and entertaining science news as well as asking the big-picture questions about life, the universe, and what it means to be human. New Scientist