You may have seen a bunch of tweets going around saying, "I was today years old when I found out X." We've been writing about things you may have been doing wrong for a while, but it looks like it's making a comeback in a whole new way.
And it's not just lifehacks and everyday things people are learning about. They're also learning new things about TV shows like SpongeBob Square Pants and That '70s Show, too.
It's definitely never a dull moment in the world of the internet.