原视频：Why do we dream? - Amy Adkins（TED-Ed）
难度：中高级；分类：知识与科普；时长：5:38；标签：讲解、心理
TED-Ed 动画科普，梳理弗洛伊德愿望满足、记忆巩固等关于人为什么做梦的主要理论，旁白清晰、信息密集，适合中高级学习者练习听懂科普讲解。
视频探讨人类为何做梦，回顾了从古至今对梦的探索，并介绍了七个主要科学理论：满足愿望、记忆巩固、遗忘清理、维持大脑运转、演练本能、情绪疗愈和解决问题。
Mesopotamian kings recorded and interpreted their dreams on wax tablets.
which relate to the fulfillment of our subconscious wishes.
and psychological issues stemming from its repression
There are about 10,000 trillion neural connections
your neocortex reviews these neural connections
from your brain's need to constantly consolidate and create long-term memories
of our unconscious primitive thoughts, urges, and desires.
We dream to rehearse.