Ammonite Fibonacci T-shirt

Ammonites were incredible sea creatures that first entered the fossil record 400 million years ago. They survived several mass extinction events, including the Permian–Triassic "Great Dying" which wiped out 96% of all marine species. They finally succumbed during the Cretaceous-Paleogene extinction event 66 million years ago, which also wiped out the dinosaurs. The size of ammonite shells range from sub-centimeter dwarf species to giants nearly three meters in diameter. Most iconic shells exhibit a nearly perfect logarithmic spiral. This t-shirt celebrates the unique mathematical beauty of these animals. Show off your love for one of Earth's coolest fossils! Note: Currently, this shirt is only available for US Shipping. This t-shirt is everything you've dreamed of and more. It feels soft and lightweight, with the right amount of stretch. It's comfortable and flattering for all.  • 100% combed and ring-spun cotton (Heather colors contain polyester) • Fabric weight: 4.2 oz./yd.² (142 g/m²) • Pre-shrunk fabric • Side-seamed construction • Shoulder-to-shoulder taping • Blank product sourced from Nicaragua, Mexico, Honduras, or the US Note: This product is printed on demand for you when you place an order. It will ship separately from other items in your order. Fulfillment time is between 2-5 business days and shipping time is estimated between 4-21 business days.