The Martian T-Shirt by Pauline Acalin aka Pacalin. The World's Greatest Botanist is a Lego parody t-shirt for fans of the Martian. Let's go to Mars, guys!
This shirt is sold by TeePublic. TeePublic is an e-commerce platform that connects independent artists with their fans and allows them to sell their art on t-shirts, apparel, and accessories.