Have you ever seen someone whose age you just can't figure out? Maybe you can't even try to guess it, because they look both young and old at the same time. Surprisingly, this isn't as uncommon as you might think. There are quite a few people out there whose age we can't begin to understand, and it's become a whole form of online humor that both confuses and amazes us. We're not sure how people like this exist, but we're glad they do, because we'll never truly know how old they are, and even though it seems over-the-top to be wondering about the age of a stranger, it can be a great mystery to try and solve.

The subreddit /r/13or30 is dedicated to confusing its members with the most androgenously-aged people it can find. The people pictured in this collection have obviously discovered the Fountain of Youth somewhere in the world but won't share the secret location with any of us. However, they kind of prove that maybe we're better off without it. Help decide if these people are 13 or 30.