Do spiders dream? Scientists just found a surprising clue

Scientists have discovered that spiders may sleep in ways surprisingly similar to humans, complete with distinct sleep stages and a dream-like REM state. Researchers at the University of Bonn studied the Australian jumping spider Portia fimbriata, a remarkably clever hunter known for its sophisticated strategies. By recording the spiders over several days and nights, they found clear evidence of regulated sleep, including a REM-like stage marked by eye movements and muscle twitches.

Do spiders dream? Scientists just found a surprising clue. Scientists just found a surprising clue Science News from research organizations Do spiders dream. Rößler Scientists at the University of Bonn have discovered that spiders experience distinct stages of sleep, including a REM-like state that shares surprising similarities with human sleep.

During this stage, the spiders move their eyes and twitch their muscles, behaviors also associated with REM (rapid eye movement) sleep in humans and other vertebrates. The findings provide the first comprehensive experimental confirmation that spiders experience genuine, regulated sleep rather than simply remaining inactive. They also raise intriguing questions about how sleep evolved and whether animals with very different nervous systems might share some of its fundamental features.