It’s somewhat astonishing when you consider what sleep paralysis looks like at different points in history and geography. The phenomenon itself hardly varies. People wake up in the middle of the night fully conscious they are awake, but they can’t move. They have a pressure on their chest as if something is lying on it. They feel a presence in the room. Sometimes they even hear or see things that are, to all appearances, completely real. You just turn on the part of the same whether you’re in Europe hundreds of years ago or living in a modern city today, and you’re fine. What differs is the way people describe it.

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