This is the fossil upon which the T shirt design was based. The fossil pictured is “Big John,” the largest Triceratops skeleton ever discovered and one of the most impressive dinosaur specimens in the world. Unearthed in South Dakota in 2014, Big John measures over 26 feet long and boasts a massive skull spanning more than 8 feet. This Late Cretaceous titan lived over 66 million years ago, and its fossilized remains are remarkably complete—about 60% of the skeleton was recovered, including 75% of the skull. In 2021, Big John made headlines when it was sold at auction for a staggering $7.7 million, setting a record for a Triceratops fossil. While the sale sparked debate among scientists concerned about public access to such specimens, Big John continues to capture imaginations as a symbol of both natural history and the modern fossil market.