A Stegosaurus shows off its thagomizer in a dark Jurassic forest about 150 million years ago, low light catching its plates and the four tail spikes. The name thagomizer started as a joke in a 1982 Far Side cartoon and was later adopted by paleontologists. Painted like a 1990s airbrushed nature tee, with ferns, horsetails and a cycad at its feet, the forest between the trees is the dark shirt itself. Made from lightweight 100% ring-spun cotton with a soft, sensory-friendly feel. Every order funds kelp restoration on the Pacific Northwest coast.