The mysterious fossil tooth whorl that we now know to be the lower, buzz-saw shaped jaw of the Permian-era shark, Helicoprion, perplexed Paleontologists for decades. But there's no confusion about what an amazing design it makes for a lovely trucker hat!

Graphic illustration by Aaron John Gregory beautifully embroidered locally in San Francisco on an navy/cream colored, Eco Trucker made from recycled materials by Econscious.