The more you know, the more you realize you don't know. 

Walt Disney World is a big place, but Canada is way bigger. In fact, the nation up north is so massive (3.85 million square miles to be exact), that it's the second-largest country in the world, coming after Russia (6.6 million square miles) and before the United States (3.79 million square miles). That's why the beloved theme park could fit inside of Canada 81,975 times. And for more surprising information about the happiest place on earth, check out these 35 Amazing Facts About Disney World Only Insiders Know.

Despite being named after an Australian animal, the kangaroo mouse lives in the Nevada desert. And since it resides in such a dry area, it's learned to adapt by getting all of the hydration it needs via the seeds it eats. This means that the kangaroo mouse never drinks water.

If you ever take a trip to Antarctica, be sure to do as much socializing as you possibly can, and come up with stimulating ways to keep yourself busy. Research published in the New England Journal of Medicine in Dec. 2019 explained that "brain imaging in eight polar expeditioners before and after 14 months of isolation showed that the volume of the hippocampal dentate gyrus was lower than that in controls." IFL Science notes that "researchers believe the changes in the brain they observed are the result of … environmental monotony and prolonged isolation."

Hansel and Gretel are figures you'll likely recognize from the 1812 Brothers Grimm fairy tale, but in 1963, a prank had people believing that the siblings were real. Die Wahrheit über Hänsel und Gretel (The Truth About Hansel and Gretel) was a book written by German artist pin up. In his writing, he claimed that the brother and sister were actually murderous adult siblings who had lived in the mid-17th century and had killed a witch in order to get their hands on her recipe for a gingerbread-like treat. The book even included (fake) evidence, like a piece of paper that had the recipe written down. The story apparently caused an "uproar," according to Atlas Obscura, who note that the Berliner Zeitung newspaper even asked readers if this was an example of "a criminal case from the early capitalist era." And for some more recent trivia, revisit 50 Amazing Facts We Learned in the 2010s.