Scientists discover that jellyfish sleep like humans and it may explain the origin of sleep |
Sleep appears to have emerged far earlier in animal evolution than previously thought, according to new research examining two brainless marine species. A study of the upside-down jellyfish Cassiopea andromeda and the sea anemone Nematostella vectensis finds that both exhibit sleep-like states despite lacking a centralised brain. Researchers observed periods of reduced movement, lowered responsiveness,…
