What exactly is the Upside Down in 'Stranger Things'? The wormhole revelation, explained.

The revelatory moment arrives during "Stranger Things" Season 5, Volume 2, when Dustin Henderson (Gaten Matarazzo) comes to ...
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Stranger Things: The Upside Down explained | History, Mind Flayer, Eleven, Billy and more

The upside down is a dark mirror antimatter version of our universe that is inhospitable to humans and is dangerous for all that venture into it. The landscape of the upside down is similar to our ...