The subreddit /r/13or30 is dedicated to confusing members with the most androgenously-aged people it can find. That may not make a lot of sense in description alone, but you've definitely seen people like this in the wild. People whose age you just can't guess, because you could definitely view them as either young or old, but something about their faces is just not quite distinguishable. It's a bizarre phenomenon, but surprisingly common.

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, because we're a little weirded out by the way they look, and not always in a good way. Help decide if these 20 people are 13 or 30 or if they exist beyond the categorization of age altogether. Because we really don't know, either.