Why Do We Dream? Science Has 3 Answers (And One Deep Mystery)

Last night you flew over a city, showed up late to a class you finished years ago, or fell off something that doesn't exist. By breakfast you had forgotten most of it. Your brain burns about as much energy asleep as it does awake. So what is it doing all night, and what are dreams for? This video follows the search for an answer: 1899: Freud says dreams are hidden messages, with no way to test it The sleep lab discovery of REM, when the sleeping brain switches "on" The cat experiments that showed why your body goes limp while you dream The theory that dreams are just static, and the patients who proved REM and dreaming are not the same thing Tetris, amnesia, and a nap: how dreams replay what you are learning Answer 1: sorting memories into keep and toss Answer 2: taking the sting out of stressful feelings Answer 3: rehearsing danger while you are safe in bed Why dreams are so strange, and why that might be the point The experiments where scientists talked to people who were still asleep and dreaming And the deepest mystery left: why are we conscious of any of it? CHAPTERS 0:00 Last night 1:30 Freud and 1899 2:00 The discovery of REM 3:00 Why your body goes limp 4:00 Are dreams just static? 4:50 REM is not the same as dreaming 5:40 Tetris, amnesia and memory 6:45 Stress and emotions 7:45 Rehearsing danger 8:35 Why dreams are so strange 9:50 Talking to a dreamer 11:20 The deepest mystery #dreams #sleep #neuroscience #psychology #brain