Harry Potter and the Sorcerer's Stone was first published in America in 1998. The movie adaptation took audiences to the wizarding world for the first time three years later. Finished after seven books and eight movies, the series is still incredibly popular, even resulting in the Fantastic Beasts franchise. With such rampant fandom, it's only natural that new fan theories are still being created today. Some are ridiculous and reach for stars that just aren't there. Others are more interesting, causing a person to stop and think, "could this be right?" Here are some of those fan theories.

You'll never believe where one theorist believes Mary Poppins went to school!

There Was A War Between Wizards And Muggles

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One of the biggest unanswered questions in the Harry Potter universe is why the wizarding world is hidden from the muggle (human) world. The series plothole has led fans to speculate about the answer for years, but J.K. Rowling has never revealed the truth.

The most logical fan theory is that in the dark ages there was a war between the two worlds. At the end of the war, the two worlds decided to separate, realizing they could never live in harmony together.

Or were the wizards banished? Find out on the next slide!