Why You Forget Almost Every Dream You Have?

Why do we dream, and why do you forget your dreams almost the moment you wake up? The answer is hidden in what happens during REM sleep — and it isn't a flaw in memory. Your brain deletes your dreams on purpose. Every night your brain builds an entire world, and every morning it erases almost all of it. You'll dream for years over the course of your life, yet you'll remember almost none of it. There's a system inside your brain whose job, every single night, is to make sure you wake up not remembering — and the reason why is stranger than forgetting itself. In this video we look at what actually happens during REM sleep, why the chemical that normally saves your memories switches off while you dream, and what a 2019 discovery revealed about the cells that actively delete dreams while they're still happening. Then we get to the part almost no one talks about: why your brain might be erasing those dreams to protect the only reality you're able to live in. If your brain saved every dream, your past would be infected — fake conversations, fake places, fake memories you never lived. Forgetting may be the only reason your waking life still feels real. Ever woken up at 3 a.m. with a dream so vivid you swore you'd never forget it — and lost it by morning anyway? Tell me about the one dream you wish you'd kept, down in the comments. SOURCES / REFERENCES Izawa, S. et al. (2019). "REM sleep–active MCH neurons are involved in forgetting hippocampus-dependent memories." Science, 365(6459), 1308–1313. https://www.science.org/doi/10.1126/s... National Institutes of Health (NINDS) — "The brain may actively forget during dream sleep" (2019) https://www.nih.gov/news-events/news-... Nagoya University — Research summary (Yamanaka Lab) https://www.med.nagoya-u.ac.jp/medica... Study led by Shuntaro Izawa; senior authors Akihiro Yamanaka (Nagoya University) and Thomas Kilduff (SRI International). Funded by the U.S. National Institute of Neurological Disorders and Stroke (NINDS).