A cartoon about dreaming might seem doubly pointless, like trivia wrapped in nonsense. If, however, dreaming is recognized as the play of the imagination in sleep, then the cartoon format becomes ...

Do dogs dream too? And if so, what do dogs dream about? The answer is yes, dogs do dream while they sleep. An MIT study found that rats dream about the activities they performed earlier in the day.

During this phase, now called “REM sleep,” people tended to have vivid dreams. Maybe, Kleitman suggested, the eye movements reflected “where and at what the dreamer was looking” in their ...