Watch an octopus waking up from what scientists think could have been a nightmare

An octopus in a laboratory changing from white to orange and swimming away

Scientists have filmed an octopus exhibiting strange behaviors in a laboratory in New York that could be explained by it having nightmares. Over the course of a month, researchers watched as the octopus appeared to jolt out of a restful sleep and thrash around, in a behavior that seemed almost like the animal was suffering from some kind of sleep disorder.