When you grow up in the Southwest, and you visit any sort of Anasazi cultural site, you are told that arrowheads are these amazing things that demonstrate the unparalleled skill of ancient artisans. And then you're handed this misshapen, asymmetric, uneven, un-sharp thing made out of obsidian that you couldn't get on an shaft with a roll of duct tape and a tube of JB Weld and then they say "this was found right here!"

Should you find yourself in a corner of the country where there hasn't really been foot traffic since the 1400s you will find the ground littered with semi-formed obsidian arrowheads and the flakes of their creation. None of them are any good. And if you are lucky enough to find someone knowledgeable, they will say

"Of course they aren't. Those are the ones that went wrong during manufacture so they left them on the ground. Where you're standing is probably where some ten-year-old kid stood while he watched and waited for the elk to show up. Any good spearpoints that were halfway decent went back to the village with him to get critiqued and finished up or rejected. You're standing on top of an ancient whittle pile except they used volcanic glass instead of willow switches."

It is a testament to the failure of the education system that not a single one of those rangers, in all my years of being dragged from Anasazi site to Anasazi site, said "that arrowhead was probably made by a kid your age... 600 years ago. How cool is that?"