The Simpsons have been apart of our lives since 1989, and many fans consider themselves experts in all things Springfield. However, there may be a few bits of knowledge that have stayed under your radar about Homer and co. through the years. Check out these 12 facts and see how many you knew already:
1 - The Simpsons is actually a spin-off series of The Tracey Ullman Show (1987), which ended up outlasting its "parent" series by 21 years (and counting).
2 - The main characters were given a yellow colouring to attract the attention of channel surfers.
3 - Bart's hair always consists of 9 points.
4 - Homer's annoyed grunt, "D'oh!," has been added to the Oxford English Dictionary.
5 - "Comic Book Guy's" real name was finally revealed to be "Jeff Albertson". The creators thought it would be funny to give him the most conventional name they could think of.
6 - The Simpsons have visited all continents including Antarctica.
7 - Snake once attended Princeton University.
8 - Albert Brooks has appeared as 6 different characters in the Simpsons' universe, more characters than any non-cast member, and is always credited as "A. Brooks”.
9 - The official city motto for Springfield is "Corruptus in Extremis” or “extremely corrupt”.
10 - Moe's Tavern is based on a real bar called Fireside near Loyola Marymount University (where producer David Mirkin went to college).
11 - Ronald McDonald, the mascot of the McDonald's restaurant chain is a major influence behind Krusty the Clown, especially the Krusty Burger fast-food restaurant chain.
12 - According to a Simpson Family tree designed by Matt Groening, Mr. Burns is a distant relative of Homer.