If you know a young millennial, chances are they've never once had a problem spelling the word "aardvark." They also will never forget that nine times nine is 81, and that having fun isn't hard if you've got a library card. They may not have watched the PBS cartoon "Arthur" – which airs its final episodes on Feb. 21 – in 20 years or more, but pieces of it are more than likely ingrained in their brains, alongside Eminem lyrics and the name Amelia Mignonette Thermopolis Renaldi.
And even if you don't know or understand the references above, you've definitely seen what has become the show's most defining image: a clenched fist next to a yellow sweater, usually used to communicate subtle anger.
