What Is The Upside Down? 'Stranger Things' Reveals The Truth

Netflix

Spoiler alert: This post discusses plot details from Stranger Things Season 5, Episode 7.

It may have taken nearly a decade, but Stranger Things has finally given fans the answer to its most central mystery. In the penultimate episode of the series, the Hawkins team is able to figure out what the Upside Down really is — and it’s not another dimension like everyone has always guessed. No, the truth is a lot more complicated than that.

Of course, it’s the science fiction-obsessed Dustin who has the epiphany. After discovering Dr. Brenner’s journals in the Upside Down version of Hawkins Lab, Dustin is able to deduce that this mysterious, red, lightning-filled realm is actually wormhole. So, it’s technically not another world itself, but rather a bridge that...