Octopuses change color to camouflage themselves from predators such as stingrays and eels. Octopuses have even been observed changing color in their sleep. Octopus's color-changing ability is known as ...

If you've ever wondered if octopuses dream, science has a fascinating answer. When these eight-armed masters of disguise fall asleep, they don't simply settle into a quiet snooze. Instead, they ...