Sub-Atomica - inside the microscopic galaxy that connects the Marvel Universe to the Quantum Realm

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Janet Van Dyne namechecks Sub-Atomica in Ant-Man and the Wasp: Quantumania

Fantastic Four Annual #5 art
(Image credit: Marvel Comics)

In the MCU, the place that exists way down below the size of atoms themselves is known as the Quantum Realm, a dimension that is connected to the core Marvel reality, but where time and space move differently.

The concept is so key to the MCU it's referenced in the title of Ant-Man and the Wasp: Quantumania, which takes Scott Lang, Cassie Lang, and Hope Van Dyne deep into the Quantum Realm. 

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(Image credit: Marvel Comics)

In Marvel Comics, Sub-Atomica is the name given to a galaxy that exists within the Microverse (the Marvel Comics term for the Quantum Realm), and it's home to a variety of worlds and characters, some of whom - such as Bill Murray's Krylar and Katy M. O'Brien's Jentorra - have cameo roles in Ant-Man and the Wasp: Quantumania.

Interestingly enough, Jentorra has a deeper connection to Sub-Atomica in Marvel Comics, where she's the niece of Jarella, empress of the subatomic world of K'ai. Jarella was the one-time lover of none other than the Hulk, who once had an extended stay in Sub-Atomica himself.

That also makes the Marvel Comics version of Jentorra the cousin of Hulk's son Skaar, who was recently introduced in the MCU at the end of She-Hulk.

Sub-Atomica is also home to Fantastic Four villain the Psycho-Man, a Microversal mad scientist who uses technology that can manipulate the emotions of others to try and conquer the Marvel Universe at large (pun intended).

It's hard to say whether Sub-Atomica or its other denizens will play a larger role in the MCU after Quantumania, but given the fact that Janet Van Dyne indicates in the film that both Sub-Atomica and the Quantum Realm itself seem to be connected to the mysterious realm known as the Void, as seen in Loki, it's possible that Sub-Atomica could become a much bigger deal on the road to Avengers: Kang Dynasty.

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George Marston
George Marston
Entertainment Writer

I've been Newsarama's resident Marvel Comics expert and general comic book historian since 2011, and now I'm the Entertainment Writer at GamesRadar+. I've also been the on-site reporter at most major comic conventions such as Comic-Con International: San Diego, New York Comic Con, and C2E2. Outside of comic journalism, I am the artist of many weird pictures, and the guitarist of many heavy riffs. (They/Them)